- Which sentence is off topic and should be removed to sharpen the paragraph's focus on the theater's ticketing upgrades?
Answer: Sentence 3
When you encounter questions about paragraph focus and coherence, you need to identify the main topic and spot any sentences that stray from it. This paragraph's central focus is clearly the theater company's new ticketing system and its benefits.
The correct answer is B because sentence 3 discusses a completely different topic—a neighboring city's plans to build a sports arena. This information has nothing to do with the theater's ticketing upgrades and disrupts the paragraph's coherence. It's essentially random information that belongs in a different discussion entirely.
Let's examine why the other options are wrong:
Choice A (sentence 2) directly supports the main topic by describing a specific feature of the new ticketing system—the interactive online seating chart. This is exactly what the paragraph should include.
Choice C (sentence 4) also relates to the ticketing upgrades by explaining another feature—automated email reminders. This shows how the new system improves customer communication.
Choice D (sentence 5) provides evidence of the upgrade's success by quantifying the improvement in wait times. This conclusion strengthens the paragraph by showing measurable benefits.
When tackling paragraph coherence questions on the SHSAT, always identify the main topic first, then check each sentence to see if it directly relates to that topic. Look out for sentences that introduce entirely new subjects—these are usually the ones that need to be removed. The key is ensuring every sentence works together to develop one central idea.
- Which sentence should be removed from the paragraph to improve its focus on the process of making stained glass?
Answer: Sentence 5
When you encounter a question asking which sentence to remove for better focus, you're being tested on paragraph unity—the idea that all sentences in a paragraph should support the same main topic or purpose.
This paragraph focuses specifically on the process of creating stained glass windows. Let's trace the logical flow: Sentence 1 introduces the craft, sentence 2 describes the first step (creating a design), sentence 3 explains the second step (cutting colored glass), and sentence 4 covers the final step (assembling with lead strips). These four sentences work together to explain the sequential process from start to finish.
Sentence 5, however, shifts away from stained glass creation entirely. It discusses modern buildings using clear glass to maximize natural light—a completely different topic about contemporary architecture and lighting design. This sentence breaks the paragraph's unity and focus, making D the correct answer.
Looking at the wrong choices: A is incorrect because sentence 2 directly supports the process by explaining the essential first step of design transfer. B is wrong because sentence 3 describes the crucial middle step of cutting colored glass pieces. C is incorrect because sentence 4 explains the final assembly process that completes the window-making procedure.
Strategy tip: When questions ask about removing sentences for focus, identify the paragraph's main purpose first, then look for the sentence that discusses a different topic entirely. The "odd one out" that doesn't contribute to the unified theme is typically your answer.
- Which sentence should be deleted for being unrelated to the description of the river trail?
Answer: Sentence 4
This question tests your ability to identify unity and coherence in writing. When evaluating whether sentences belong in a passage, you need to determine if each sentence supports the main topic and purpose.
The passage describes a park trail that runs along a river, focusing on features and information relevant to hikers using this specific trail. Sentence 4 mentions "The town's public library was renovated with energy-efficient windows last year," which has absolutely nothing to do with the river trail, hiking, or the park. This sentence disrupts the passage's unity because it introduces an completely unrelated topic.
Looking at the other choices: Sentence 2 (A) discusses bear spray for hikers, which directly relates to trail safety and is relevant information for people using this hiking trail. Sentence 3 (B) describes wildflowers along the path, which helps hikers know what to expect seasonally and adds to the trail description. Sentence 5 (D) mentions trail maps at markers, which is essential navigational information for trail users.
Each of these sentences connects logically to the main topic of describing the river trail and providing useful information for hikers. Only sentence 4 introduces information about a completely different subject—the library renovation—that has no connection to the trail or hiking experience.
When you encounter questions about sentence deletion or paragraph unity, always ask yourself: "Does this sentence support the main topic?" If a sentence could be moved to a completely different article without losing meaning, it probably doesn't belong in the current passage.
- Which sentence disrupts the paragraph's unity and should be deleted?
Answer: Sentence 4
When you encounter questions about paragraph unity, you're being tested on whether all sentences work together to support a single main topic or theme. A unified paragraph maintains focus throughout, with every sentence contributing to the central idea.
Looking at this passage, sentences 1, 2, 3, and 5 all relate to a smartphone app for tracking water intake. Sentence 1 introduces the app's basic functions, sentence 2 discusses its customizable features, sentence 3 provides supporting evidence about hydration benefits, and sentence 5 describes the app's analytical capabilities. These sentences work together to paint a complete picture of a hydration-tracking application.
Sentence 4, however, completely shifts topics to "early telegraph systems" and "Morse code" — technologies that have nothing to do with modern smartphone apps or water tracking. This sentence breaks the paragraph's unity by introducing an unrelated historical topic.
Choice A is incorrect because sentence 2 directly supports the main topic by explaining additional features of the water-tracking app. Choice B is wrong because sentence 3 strengthens the paragraph by providing scientific justification for why such an app would be valuable. Choice D is incorrect because sentence 5 continues discussing the app's functionality, specifically its data analysis features.
For paragraph unity questions on the SHSAT, always identify the main topic first, then check whether each sentence directly relates to that central theme. Any sentence that introduces a completely different subject matter disrupts unity and should be eliminated.
- Which sentence is least relevant to the paragraph's focus on the Library of Alexandria?
Answer: Sentence 5
When you encounter a question about relevance, you need to identify the main focus of the paragraph and determine which sentence strays from that central topic.
This paragraph focuses specifically on the Library of Alexandria - its significance, purpose, scholarly community, and institutional context. Let's examine how each sentence connects to this main topic.
Sentence 5 (choice B) is the correct answer because it discusses papyrus and how it's made from water plants. While papyrus was indeed used for scrolls in the library, this sentence shifts away from the Library of Alexandria itself to explain a general fact about an ancient writing material. The information about papyrus manufacturing doesn't advance our understanding of the library's importance, function, or characteristics.
Choice A (Sentence 2) is wrong because it directly supports the main topic by explaining the library's founding date and ambitious mission to collect all world knowledge. Choice D (Sentence 3) is wrong because it describes the scholarly community that used the library and gives important details about the collection size. Choice C (Sentence 4) is wrong because it provides crucial context about the library's institutional setting within the larger Mouseion research complex.
When tackling relevance questions, ask yourself: "Does this sentence directly relate to and develop the paragraph's main subject?" If a sentence feels like a tangent or encyclopedia entry that could appear in any general discussion of the topic, it's likely the least relevant choice.
- Which sentence should be removed from the paragraph to improve its focus on the impact of the printing press?
Answer: Sentence 4
When you encounter questions about paragraph focus and coherence, you need to identify which sentence doesn't support the main topic or thesis. Here, the paragraph focuses on how the printing press impacted society by making information more accessible.
Sentence 4 should be removed because it discusses the aesthetic qualities of medieval manuscripts—their beautiful illuminations and intricate designs. While this information relates to books before the printing press, it doesn't connect to the paragraph's central argument about the printing press's revolutionary impact on information access. The sentence is a tangent about artistic beauty rather than accessibility or societal change.
Let's examine why the other options are essential: Choice (A), Sentence 2, directly explains the printing press's core impact—mass production leading to wider accessibility. This is fundamental to the paragraph's thesis. Choice (C), Sentence 3, provides crucial context by contrasting the old hand-copying method with the new technology, emphasizing why the printing press was revolutionary. Choice (D), Sentence 5, demonstrates the broader historical consequences of this accessibility, showing how the printing press influenced major movements like the Renaissance and Reformation.
Notice how sentences 1, 2, 3, and 5 create a logical flow: introduction → main impact → contrasting background → broader consequences. Sentence 4 interrupts this flow with irrelevant detail about manuscript decoration.
For paragraph coherence questions, always ask: "Does this sentence advance the main argument?" If it's just interesting but unrelated information, it likely needs to go.
- Which sentence is least relevant to the paragraph's focus on the benefits of green roofs and should be cut?
Answer: Sentence 4
When you encounter a question about paragraph coherence, you need to identify the main topic and determine which sentences support that focus. This paragraph centers on the benefits of green roofs in urban environments.
Let's examine how each sentence relates to this main topic. Sentence 1 introduces green roofs as a solution for storm-water management, establishing the paragraph's focus on their benefits. Sentence 2 continues this theme by explaining how green roofs absorb rainfall and prevent flooding. Sentence 5 adds another benefit by discussing reduced cooling costs, which directly supports the paragraph's purpose.
Sentence 3 mentions beehives on rooftop gardens to help pollinators. While this shifts slightly from the infrastructure benefits to ecological ones, it still connects to green roofs and their positive environmental impact.
Sentence 4, however, discusses the first skyscraper built in Chicago in 1885 and its impact on urban skylines. This sentence provides historical information about urban development but has no connection to green roofs or their benefits. It interrupts the paragraph's coherent discussion about green roof advantages.
Looking at the wrong answers: (A) Sentence 1 establishes the main topic, so removing it would eliminate the paragraph's focus. (B) Sentence 3 still relates to green roofs, even though it discusses a different type of benefit. (D) Sentence 5 directly supports the main topic by providing another concrete benefit.
For paragraph unity questions, always ask yourself: "Does this sentence advance the main idea?" If a sentence introduces completely unrelated information, it likely needs to be cut.
- Which sentence should be removed from the paragraph because it does not support the focus on the longship's design and function?
Answer: Sentence 4
When you encounter questions about paragraph unity, you need to identify the main focus and determine which sentences support that central idea. This paragraph clearly focuses on the Viking longship's design features and how those features functioned in practice.
The correct answer is C because sentence 4 ("Viking society was divided into several social classes") completely shifts away from discussing the longship to describing social structure. This sentence introduces an entirely different topic that has nothing to do with the ship's engineering, design, or capabilities. It breaks the paragraph's coherent focus on the longship itself.
Looking at why the other options are wrong: Choice A (sentence 2) directly supports the main focus by describing specific design features of the hull and their functional benefits. Choice B (sentence 3) explains how the design advantages mentioned in sentence 2 translated into practical military and exploration benefits. Choice D (sentence 5) continues discussing the ship's design by explaining its propulsion system and how that design choice provided functional advantages.
Notice that sentences 1, 2, 3, and 5 create a logical flow: introducing the longship as an engineering masterpiece, describing its hull design, explaining the strategic advantages of that design, and then detailing another design feature (the propulsion system). Sentence 4 interrupts this flow with unrelated information about social classes.
For paragraph unity questions, always ask yourself: "What is the main topic?" Then eliminate any sentence that doesn't directly relate to or support that central focus, even if it might be factually accurate about the broader subject.
- Which sentence should be removed because it shifts focus away from the general benefits of regular exercise for typical individuals?
Answer: Sentence 4, because it discusses specialized athlete nutrition rather than exercise benefits for general populations.
This question tests your ability to identify irrelevant information that disrupts a passage's focus and coherence. When evaluating whether a sentence belongs in a passage, you need to consider whether it directly supports the main topic and intended audience.
The passage focuses on "benefits of regular exercise" for typical individuals. Each sentence should explain how exercise helps the general population. Let's examine what disrupts this focus.
Sentence 4 discusses "specialized nutrition plans" for "professional athletes" — this shifts away from exercise benefits entirely and narrows the audience from general individuals to elite athletes. This nutritional information doesn't explain any benefit that regular exercise provides to typical people, making it completely off-topic.
Looking at the other choices: Choice A is incorrect because sentence 3 discusses bone density and muscle mass benefits that apply to everyone, not just aging people — these are universal exercise benefits. Choice C is wrong because cognitive benefits are absolutely relevant exercise benefits for all individuals; the passage appropriately covers both physical and mental health benefits. Choice D is incorrect because immune system benefits are well-recognized exercise advantages that apply to the general population.
The key trap here is confusing "specific details" with "irrelevant content." Sentences 3, 7, and 9 all provide specific details about legitimate exercise benefits, while sentence 4 introduces completely different subject matter (nutrition) and audience (professional athletes).
When identifying irrelevant sentences, ask yourself: "Does this directly explain a benefit that exercise provides to the intended audience?" If it shifts topic or audience, it likely doesn't belong.
- Which sentence should be removed because it does not directly support the paragraph's main idea about urban gardening?
Answer: Sentence 5
This question tests your ability to identify when a sentence breaks paragraph unity by introducing an unrelated idea. When evaluating paragraph coherence, you need to determine which sentences directly support the main topic and which ones stray from it.
The paragraph's main idea focuses specifically on urban gardening and its benefits. Let's examine how each sentence relates to this central theme. Sentence 1 introduces urban gardening by defining the practice. Sentence 2 supports this by providing specific examples of where these gardens are located. Sentence 3 develops the idea further by explaining nutritional benefits, while sentence 4 adds information about community and beautification benefits.
However, sentence 5 introduces public parks with playgrounds and sports facilities, which is a completely different topic from urban gardening. While parks are also green spaces in cities, they don't relate to the specific practice of transforming unused spaces into productive gardens that the paragraph discusses.
Looking at the wrong answers: (A) Sentence 2 directly supports the main idea by showing where urban gardens are typically located. (B) Sentence 3 explains a key benefit of urban gardening—improved nutrition and food security. (D) Sentence 4 provides additional benefits of urban gardening, including beautification and community connection.
The correct answer is (C) because sentence 5 breaks paragraph unity by discussing a related but distinct topic.
Strategy tip: When identifying sentences that don't support a paragraph's main idea, look for ones that introduce new topics rather than develop or support the established theme, even if they seem loosely related.
- Which sentence should be removed because it discusses retail sales rather than community garden benefits for neighborhoods and residents?
Answer: Sentence 4, because it addresses hardware store sales rather than direct benefits that community gardens provide.
When you encounter a question asking which sentence should be removed from a passage, you need to identify which sentence doesn't support the main purpose or thesis. This passage focuses on how community gardens benefit neighborhoods and residents directly.
The correct answer is B because sentence 4 discusses hardware store sales increasing during gardening seasons. While this might be an indirect effect of community gardens, it doesn't describe a benefit that gardens provide to neighborhoods or residents. Instead, it focuses on commercial retail activity, which is outside the passage's scope of community and resident benefits.
Let's examine why the other choices are incorrect. Choice A is wrong because sentence 2 directly supports the thesis by explaining how gardens help residents save money on groceries and reduce food transportation costs—these are clear resident benefits. Choice C misunderstands the passage's scope; sentence 6 about air quality improvement is absolutely a neighborhood benefit from community gardens, and environmental advantages are explicitly mentioned in the opening sentence. Choice D is incorrect because sentence 9 describes how gardens increase property values and neighborhood pride, which are direct community benefits that align perfectly with the passage's purpose.
Study tip: When identifying irrelevant sentences, ask yourself: "Does this sentence directly explain how the main topic benefits the target audience?" If a sentence discusses side effects or tangential outcomes rather than core benefits, it's likely the one to remove. Focus on staying within the stated scope of the passage's thesis.
- Which sentence contains a detail that is not relevant to the description of the Amazon rainforest?
Answer: Sentence 4
When you encounter questions about relevance in reading passages, you need to identify the main topic and determine which details support that central focus. This passage is specifically about the Amazon rainforest and its characteristics.
The correct answer is B because sentence 4 discusses Brazil's status as the largest country in South America by area and population. While Brazil does contain much of the Amazon, this sentence shifts focus to the country's general geographic and demographic characteristics rather than describing the rainforest itself. It's an off-topic detail that doesn't contribute to our understanding of the Amazon's features or importance.
Let's examine why the other choices are wrong: Choice A (sentence 2) is highly relevant because it directly describes the Amazon's incredible biodiversity, stating it contains 10% of all known species on Earth. Choice C (sentence 3) continues this biodiversity theme by providing specific examples of the species mentioned in sentence 2 - insects, plants, birds, and mammals. Choice D (sentence 5) is relevant because it explains the Amazon's critical environmental role in climate regulation through carbon dioxide absorption.
To master these questions, always ask yourself: "What is the paragraph's main purpose?" Then evaluate each sentence against that purpose. Details about related topics (like Brazil's size) might seem connected, but if they don't directly support the main focus, they're likely irrelevant. Look for sentences that seem to introduce new, unrelated information rather than developing the established topic.
- Which sentence should be removed because it discusses dormitory policies rather than the direct importance of sleep for students?
Answer: Sentence 4, because it focuses on dormitory quiet hours rather than the physiological or academic benefits of sleep.
When you encounter questions about paragraph unity and relevance, you need to identify which sentence breaks the main focus or introduces an off-topic element that doesn't directly support the central argument.
This passage focuses specifically on why sleep is important for students, examining the direct physiological, cognitive, and academic benefits. The correct answer is A because sentence 4 shifts away from explaining sleep's importance to discussing dormitory policies. While quiet hours might help students sleep better, the sentence doesn't explain any direct benefits of sleep itself—it's about institutional policies rather than sleep's inherent value.
Let's examine why the other options are incorrect. Choice B is wrong because sentence 7 directly explains a physiological benefit of sleep (growth hormone release), which is especially relevant for student development. Choice C is incorrect because sentence 8 discusses how sleep strengthens the immune system, which directly relates to academic success by preventing illness-related absences. Choice D is wrong because sentence 9 concludes by connecting sleep schedules to academic optimization, staying within the scope of sleep's importance.
The key distinction is that sentences 5, 6, 7, 8, and 9 all explain what sleep does for students, while sentence 4 discusses what dormitories do about noise. It's the only sentence that shifts focus from sleep's benefits to external policies.
Strategy tip: For paragraph unity questions, ask yourself whether each sentence directly supports the main topic. Look for sentences that introduce new subjects (like policies or regulations) rather than exploring different aspects of the central theme.
- Which sentence should be removed because it does not support the passage's central focus?
Answer: Sentence 4
When you encounter questions about paragraph coherence and unity, you need to identify which sentence disrupts the passage's main focus and logical flow.
This passage centers on coral reef ecosystems—their characteristics, importance, threats, and conservation efforts. Each sentence should directly relate to this scientific topic. Let's examine how well each sentence fits:
Sentence 4 discusses renewable energy storage, solar and wind power, and battery systems for electricity production. This content is completely unrelated to coral reefs and marine ecosystems. It appears to belong in a different passage entirely, making it the clear outlier that should be removed.
Why the other options don't work: Choice A (Sentence 3) directly supports the passage by explaining coral reefs' ecological and economic importance through their roles as nursery habitats, coastal protection, and economic drivers. Choice C (Sentence 5) is essential because it identifies the major threats facing coral reefs, which connects logically to the conservation efforts mentioned later. Choice D (Sentence 7) fits perfectly by describing current research efforts to address the climate threats mentioned in Sentence 5.
The passage flows logically from introducing coral ecosystems, to explaining their importance, to discussing threats, and finally covering conservation and research responses. Sentence 4 completely breaks this coherent progression.
Strategy tip: On coherence questions, ask yourself whether each sentence relates to the passage's central topic. If a sentence seems like it belongs in a completely different article, it's likely your answer. Look for obvious topic shifts that break the logical flow.
- Which sentence disrupts the coherence of the passage and should be removed?
Answer: Sentence 4
When you encounter a question about passage coherence, you're being tested on your ability to identify sentences that don't fit the main topic or logical flow. Look for sentences that seem to jump to an unrelated subject.
This passage focuses on sleep cycles and their importance for health. Let's examine how each sentence connects to this central theme. Sentence 1 introduces the topic of sleep cycles and health. Sentences 2, 3, and 5 all describe different stages of sleep and their functions - this creates a logical progression explaining what happens during sleep. Sentence 6 offers practical advice about maintaining sleep schedules, while sentences 7 and 8 discuss sleep disruption consequences and modern monitoring tools. All of these relate directly to sleep science.
However, sentence 4 discusses "professional athletes" and their "training regimens" involving "multiple hours of practice daily across various sports disciplines." This sentence completely shifts away from sleep cycles to athletic training, creating a jarring interruption in the passage's flow. It doesn't connect to the sleep theme at all.
Looking at the other choices: (A) Sentence 3 directly explains deep sleep functions, which supports the main topic. (C) Sentence 5 describes REM sleep's role, continuing the explanation of sleep stages. (D) Sentence 8 discusses sleep tracking technology, which relates to monitoring the sleep cycles discussed throughout the passage.
For coherence questions on the SHSAT, always ask yourself: "Does this sentence advance or support the main topic?" If a sentence introduces completely unrelated information without connecting back to the central theme, it likely disrupts coherence and should be removed.
- Which sentence should be removed from the paragraph because it distracts from the main topic of origami?
Answer: Sentence 4
When you encounter a question asking which sentence should be removed from a paragraph, you're being tested on paragraph unity and coherence. Every sentence in a well-written paragraph should directly support or develop the main topic.
This paragraph focuses specifically on origami as an art form. Let's examine what each sentence contributes: Sentence 1 introduces origami and its defining characteristics. Sentence 2 explains how origami combines mathematical precision with art. Sentence 3 describes the basic techniques and range of creations possible. Sentence 5 discusses the skills needed to master origami.
However, Sentence 4 shifts away from origami entirely to mention "other crafts, such as quilling and collage." While these are also paper crafts, this sentence doesn't tell us anything about origami itself. It's a tangent that disrupts the paragraph's focus, making A the correct answer.
Looking at the other choices: B is wrong because Sentence 3 directly supports the main topic by explaining origami techniques and possibilities. C is incorrect because Sentence 2 develops the main idea by describing origami's unique combination of math and art. D is wrong because Sentence 5 reinforces the main topic by discussing what's required to excel at origami.
For paragraph unity questions on the SHSAT, always identify the main topic first, then check whether each sentence directly relates to and develops that specific topic. Any sentence that wanders into related but different territory should be removed.
- Which sentence should be deleted because it does not support the paragraph's focus on bioluminescence?
Answer: Sentence 4
When you encounter questions about paragraph unity and focus, you need to identify which sentence disrupts the main topic or doesn't contribute to the central idea being developed.
This paragraph focuses specifically on bioluminescence—what it is and how different organisms use it. Let's examine each sentence's relevance to this topic.
Sentence 4 is the correct answer to delete because it provides geographic information about ocean depth that has nothing to do with bioluminescence. While the sentence mentions the ocean, it doesn't connect to how organisms produce light or use it for biological purposes. It's completely off-topic and interrupts the flow of ideas about bioluminescence.
Looking at the wrong answers: Sentence 3 (choice B) directly supports the main topic by explaining how deep-sea creatures use bioluminescence for specific purposes like attracting prey and communication. Sentence 2 (choice C) is essential because it defines bioluminescence as a type of chemiluminescence, providing crucial scientific context. Sentence 5 (choice D) reinforces the main topic by giving a familiar land-based example of bioluminescence in fireflies and their mating behavior.
Notice how sentences 1, 2, 3, and 5 all work together to define bioluminescence, explain its scientific basis, and provide examples from both marine and terrestrial environments. Sentence 4 stands out as irrelevant geographic trivia.
For paragraph unity questions on the SHSAT, always ask yourself: "Does this sentence directly relate to the main topic?" If a sentence feels like random factual information that could belong in a different paragraph, it's likely the one to delete.
- Which sentence is least relevant to the main focus of the paragraph and should be removed to improve its unity?
Answer: Sentence 4
When you encounter questions about paragraph unity, you're being tested on your ability to identify which sentences work together to develop a single main idea. Every sentence in a well-written paragraph should contribute to that central focus.
This paragraph's main focus is clearly the community garden itself—its appearance, the volunteer work that maintains it, how it generates income through herb sales to restaurants, and how those profits support the garden's operations. Sentences 1, 2, 3, and 5 all directly relate to the garden's function, maintenance, and sustainability.
Sentence 4, however, discusses LED streetlights installed by the city along Maple Street. While this happened on the same street as the garden, it has no connection to the garden's operations, appearance, or community involvement. The streetlights are a separate municipal improvement project that doesn't advance the paragraph's focus on the garden.
Looking at the wrong answers: (A) Sentence 1 establishes the garden's visual appeal and serves as an effective topic sentence. (B) Sentence 2 describes the essential volunteer work that keeps the garden functioning. (D) Sentence 5 completes the cycle by explaining how the garden sustains itself financially through reinvestment of herb sale profits.
When facing unity questions on the SHSAT, ask yourself: "What is this paragraph really about?" Then check each sentence to see if it directly supports or develops that main idea. Sentences that introduce unrelated topics, even if they're factually connected to the setting, typically need to be removed to maintain focus.
- Which sentence should be removed to keep the paragraph focused on the engineering of Roman roads?
Answer: Sentence 3
When you encounter questions about paragraph coherence, you need to identify the main topic and determine which sentences support that focus. This paragraph is specifically about Roman road engineering and construction.
Let's examine what each sentence contributes to this topic. Sentence 1 establishes the scope and purpose of Roman roads - their extensive network facilitated military and trade movement. Sentence 2 details the actual construction techniques, explaining how layers of materials created durable surfaces. Sentence 4 discusses milestones as part of the Roman administrative system that supported their road network.
However, sentence 3 introduces St. George battling a dragon according to medieval legends. This content has no connection to Roman engineering, road construction, or transportation infrastructure. It's completely off-topic and disrupts the paragraph's focus.
Looking at why the other choices are wrong: Choice B (sentence 2) is essential because it explains the actual engineering techniques Romans used. Choice C (sentence 1) provides the foundational context about the road network's scope and purpose. Choice D (sentence 4) relates directly to Roman road systems by describing the milestone system that helped travelers navigate these engineered routes.
The key strategy for paragraph coherence questions is to identify the central theme first, then eliminate any sentence that doesn't directly support or develop that theme. Look for content that seems like it belongs in a completely different paragraph or essay - these are usually the sentences that need removal to maintain focus.
- Which sentence in the paragraph should be removed to eliminate an unnecessary detail?
Answer: Sentence 4
When you encounter questions about eliminating unnecessary details, you need to identify which sentence doesn't contribute to the main topic or interrupts the logical flow of ideas.
This paragraph focuses on Fleming's discovery of penicillin and its significance. Let's examine how each sentence contributes to this central theme.
Sentence 4 is correct to remove because Fleming's job title and workplace, while factually accurate, don't advance the story of penicillin's discovery or importance. The paragraph works perfectly without this biographical detail—it flows smoothly from describing the discovery process (sentences 1-3) directly to explaining the impact (sentence 5).
Looking at the wrong answers: Choice A (Sentence 2) is essential because it explains exactly how Fleming made his discovery—the contaminated petri dish observation is the heart of the story. Choice B (Sentence 3) is crucial as it connects Fleming's observation to the broader significance by identifying penicillin as "the first true antibiotic." Choice D (Sentence 5) is vital because it explains why this discovery matters, describing penicillin's life-saving impact during WWII and its revolutionary effect on treating infections.
Notice how sentences 1, 2, 3, and 5 create a complete narrative arc: introduction → discovery process → scientific significance → historical impact. Sentence 4 interrupts this flow with biographical information that doesn't enhance our understanding of the discovery itself.
Strategy tip: When eliminating unnecessary details, ask yourself: "Does this sentence advance the main idea or just add extra information?" Remove sentences that feel like tangents, even if they're factually correct.
