- The teacher asks: 'Is the connector Min-jun used correct, and does his sentence successfully support an opinion with a reason?' Which evaluation is most accurate?
Answer: Yes, it is correct. Min-jun used 'because' to link his opinion (not wanting to hike) to a supporting reason (sore legs), which is the appropriate connector for showing why he holds that opinion.
When a sentence expresses an opinion or preference and then explains the reason behind it, you need a connector that signals cause-and-effect reasoning — specifically, one that introduces the reason for the stated opinion. This is exactly what "because" does: it links a result or feeling (not wanting to hike) to its cause (sore legs).
A is correct because Min-jun's sentence follows the classic structure: opinion + "because" + reason. "I don't want to go hiking because my legs are still sore" clearly tells us why he holds that preference. The connector is logically and grammatically appropriate, and his friend's response ("That makes sense") confirms the reasoning landed correctly.
B is wrong because "so" works in the opposite direction — it introduces a result, not a reason. You would say "My legs are sore, so I don't want to hike," not use "so" to begin the reason clause as B suggests. There is no rule limiting "so" to spoken conversation either — that detail is invented.
C introduces a false grammar rule. "Because" is not restricted to negative sentences. You can just as easily say "I do want to hike because the weather is perfect." Switching to "but" when the sentence is positive would create a contrast connector where none is needed, making the sentence illogical.
D misapplies the function of "but." While "but" does show contrast, sore legs and not wanting to hike are not contrasting ideas — they are cause and effect. Using "but" here would confuse the relationship between the two clauses.
Study tip: Always ask yourself the direction of the logical relationship — is one idea the cause of the other, or are they opposing each other? "Because" = reason; "so" = result; "but" = contrast. Match the connector to the relationship, not just the sentence type.
- Dae-won's response has a logical problem. Which statement most accurately identifies the issue AND suggests the correction?
Answer: Dae-won used 'but' where he should have used 'because.' 'But' signals contrast, implying that needing rest and hobbies contradicts his opinion, when in fact it is the reason that supports reducing homework.
When answering a yes/no question, the connector you choose after your answer must accurately reflect the logical relationship between your opinion and the supporting idea. This question tests whether you understand the difference between contrast connectors and reason connectors.
Dae-won says "Yes, homework should be reduced, but students need time to rest and hobbies." The word "but" signals a contrast — it implies that needing rest somehow opposes or contradicts reducing homework. That makes no sense here. The real relationship is causal: students need rest and hobbies, and that is why homework should be reduced. The correct connector is "because," which introduces a reason that supports the opinion. So the sentence should read: "Yes, homework should be reduced because students need time to rest and pursue hobbies." This is why D is correct — it precisely identifies both the error ("but" implies contrast) and the fix ("because" signals a supporting reason).
A is wrong because it invents a rule that "but" can strengthen an argument in formal contexts. That is not how logical connectors work — "but" always signals contrast, regardless of formality. B is wrong because it creates a false, overly rigid rule. There is no grammar law requiring "because" immediately after "yes"; what matters is choosing the connector that reflects the correct logical relationship. C is tempting but incorrect — "so" would mean reducing homework results in students having free time, which reverses the logic. The free time need is the reason for the opinion, not its result.
When you see connector questions, always ask: what is the relationship — reason, result, or contrast? That question will guide you to the right answer every time.
- Which revision BEST combines the student's ideas so that his opinion is clearly supported by reasons using appropriate connectors?
Answer: I love winter the most because I enjoy skiing and snowboarding, and the cold air feels refreshing to me.
When revising a speech for clarity, your goal is to make sure the main opinion is clearly stated first, and then supported by reasons connected with logical words like because, and, so, or but. The key question to ask yourself is: does the connector actually match the relationship between the ideas?
In this speech, the student's opinion is "I love winter the most," and his reasons are (1) he enjoys skiing and snowboarding, and (2) the cold air feels refreshing. The word because signals a reason, so it should introduce those supporting details. Answer D does exactly this: "I love winter the most because I enjoy skiing and snowboarding, and the cold air feels refreshing to me." The opinion comes first, because introduces the reasons, and and smoothly adds the second reason. The logic flows naturally and completely.
Answer A is problematic because it uses but to connect the cold air detail, which signals contrast — not support. It also awkwardly circles back to restate the opinion at the end, which feels repetitive and confusing. Answer B restructures the sentence so the opinion no longer leads clearly; "skiing and snowboarding are enjoyable" becomes a vague middle statement, and the connectors don't reflect a clear cause-and-effect relationship. Answer C uses but before the skiing detail, which implies a contradiction between loving winter and enjoying winter activities — the opposite of what the student means.
A quick strategy: whenever you revise for opinion + reasons, mentally fill in the blank — "I believe X because [reason 1] and [reason 2]." If a choice breaks that logical pattern, eliminate it.
- Which sentence uses a connector incorrectly in the context of supporting an opinion or statement with a reason, and why?
Answer: Sentence 3, because 'but' signals contrast or opposition, yet the ideas that follow ('easy to care for' and 'calming to watch') are positive qualities that support the opinion rather than contrast with it.
When answering questions about connectors, your job is to check whether the logical relationship a connector signals actually matches the ideas being joined — not just whether the sentence sounds fluent.
Sentence 3 is the problematic one. The connector "but" signals contrast or opposition between two ideas. However, look at what follows: "they are easy to take care of" and "very calming to watch." Both of these are positive qualities that reinforce the speaker's liking of fish as pets — they don't contradict or push back against anything. A connector like "and" or "because" would correctly link these supportive ideas to the opinion. Using "but" creates a logical mismatch: the reader expects a drawback or counterpoint, but receives another compliment instead. This makes C the correct answer.
Now let's clear up the distractors. A is wrong because "because" can appear either before or after the opinion it supports — word order does not restrict its grammatical use. Sentence 1 ("I think cats are better… because they are more independent") is perfectly correct. B is wrong because "so" in Sentence 2 functions exactly as it should: it introduces a result ("not suitable for busy people") that follows from the preceding cause ("require a lot of attention"). The logic flows correctly, not in reverse. D is wrong because "because" has no rule requiring matching subjects across its two clauses — different subjects are completely acceptable, and Sentence 4 is grammatically and logically sound.
Your takeaway: whenever a connector question appears, don't just check grammar — mentally label the relationship each clause expresses (cause, result, contrast, addition) and verify the connector matches that relationship.
- How many distinct logical relationships are expressed through connectors in this sentence, and which connectors establish them?
Answer: Two logical relationships: 'but' signals a contrast between the general usefulness of smartphones and the specific restriction in class, while 'because' introduces the reason supporting the restriction opinion.
When analyzing a sentence for logical connectors, your job is to identify each linking word and ask: what relationship does it create between the ideas on either side of it?
In this sentence, two separate connectors appear, and each does a distinct job. The word 'but' places two ideas in opposition: smartphones are generally useful (positive claim), yet students should not use them in class (restriction). That tension is a contrast relationship. Then, 'because' follows to explain why that restriction exists — smartphones can be very distracting — which is a cause-and-reason relationship. This confirms B as the correct answer: two distinct logical relationships, each established by a different connector.
A is wrong because it misidentifies 'but' as a meaningless filler word. In English, 'but' is a coordinating conjunction with a clear grammatical and logical function: signaling contrast. Dismissing it is a serious analytical error.
C gets the functions completely backwards. 'But' does not support the first opinion — it contradicts or limits it. And 'because' does not weaken the argument; it actually strengthens the restriction claim by providing evidence. Swapping these roles shows a misunderstanding of how each connector works directionally.
D is wrong because 'but' and 'because' are never combined into a single compound connector. They appear in separate clauses and serve independent functions. Treating them as one unit erases the two distinct logical moves the sentence makes.
As a study tip: when you see multiple connectors in one sentence, analyze each one separately — ask what it does (contrast, reason, sequence, condition) before counting relationships.
- Which connector correctly and most naturally completes the student's sentence while accurately showing the logical relationship between her preference and her reason?
Answer: because
When a sentence expresses a reason or cause for something, you need a conjunction that signals that logical relationship — specifically, one that answers the question "Why?" This is what's being tested here.
The student's sentence has two clear parts: her preference (studying in the library) and her justification for it (it's quieter and she can focus better). The second half explains why she has that preference, which means you need a causal connector. That's exactly what B) because does — it directly links a cause to an effect, making the logical relationship unmistakable and natural. "I prefer studying in the library because it is quieter" flows perfectly and communicates her reasoning clearly.
Now, let's look at why the other options fail. A) "so" signals a result, not a reason — it moves forward in logic ("it is quiet, so I prefer the library"), but the sentence is structured with the preference stated first, making "so" grammatically and logically backward. C) "but" is a contrast connector, implying opposition between two ideas — there's no contrast here, only a reason, so "but" creates a confusing and illogical sentence. D) "although" is a concession connector, used when you want to acknowledge something that contradicts the main idea (e.g., "Although it's noisy, I study at home"). Here, the reason supports the preference, not contradicts it, so "although" is the opposite of what's needed.
A quick tip to remember: whenever a sentence gives a preference, opinion, or decision followed by supporting evidence, your go-to connector is almost always "because." If the second half contradicts the first, think "although" or "but."
- Which pair of connectors best completes the student's response so that the first blank introduces the primary reason and the second blank shows a logical result of that reason?
Answer: because / so
When completing a sentence with two blanks that link ideas together, you need to identify the logical role each clause plays: Is it giving a reason? Showing a result? Creating a contrast? That distinction determines which connector belongs where.
In this sentence, the student wants to say: schools should serve healthier food → reason: many students eat junk food at home → result: school meals are the only chance for nutrition. The first blank must introduce the cause or reason, and the second must show the consequence or result of that reason.
A is correct because "because" perfectly signals a reason ("because many students eat junk food at home"), and "so" signals the logical result that follows ("so school meals are their only chance to eat nutritious food"). The flow is natural and logically tight: reason → consequence.
B is wrong because it reverses the connectors. Placing "so" first tries to show a result before a reason has been stated, which is grammatically and logically backwards. "Because" in the second blank would then introduce a cause after a consequence, breaking the required order.
C is wrong because "but" signals contrast or contradiction. The two clauses here are not contrasting ideas — they support each other. Using "but" in the first blank would imply the student is about to argue against something, which distorts the meaning entirely.
D is wrong for the same reason as C regarding the second blank. Even though "because" correctly opens a reason, ending with "but" introduces a contradiction where none exists.
Study tip: Always ask yourself: Is this clause a reason, a result, or a contrast? Match the connector to the function — don't just pick familiar words.
- Which rewritten sentence correctly preserves the original meaning while using 'because' as the connector?
Answer: We cancelled the picnic because the weather was cold.
문장을 다른 접속사로 바꿔 쓸 때는 두 가지를 반드시 지켜야 합니다: 의미의 보존과 문법적 정확성. 원문 "날씨가 추웠기 때문에 소풍을 취소했다"는 원인(추운 날씨) → 결과(소풍 취소)의 인과관계를 담고 있으며, 'because'는 이 원인을 이끄는 접속사입니다.
C가 정답인 이유는 간단합니다. "We cancelled the picnic because the weather was cold."는 원문의 인과관계를 정확히 유지하면서, 불필요한 내용 없이 깔끔하게 바꿔 쓴 문장입니다. 원인과 결과의 순서만 바뀌었을 뿐, 의미는 동일합니다.
오답을 살펴보면: A는 원문에 없는 내용("stayed inside and made other plans for the following weekend")을 추가해 의미를 변형시켰습니다. 과제는 의미를 *보존*하는 것이지 확장하는 것이 아닙니다. B는 'because'와 'so'를 동시에 사용하는 심각한 문법 오류를 범했습니다. 두 접속사는 같은 인과관계를 각각 다른 방향으로 표현하므로 함께 쓸 수 없습니다. D는 원인과 결과를 완전히 뒤바꿨습니다. "소풍을 취소했기 때문에 날씨가 추웠다"는 논리적으로 말이 되지 않습니다.
전략 팁: 접속사 변환 문제에서는 항상 원문의 인과관계 방향을 먼저 파악하세요. 'so' 앞이 원인, 'because' 뒤가 원인입니다. 또한 추가 정보나 이중 접속사는 즉시 오답 신호로 인식하세요.
- Which versions correctly support an opinion or statement with a reason using an appropriate connector, and why?
Answer: Versions 2 and 3 are both correct. Version 2 correctly uses 'so' to show that tiredness caused the incomplete homework (cause → result), and Version 3 correctly uses 'because' to show the same relationship from the opposite direction (result ← cause).
When expressing cause and result in English, the connector you choose determines the word order of your sentence — and this is exactly what this question is testing. The two most common connectors are 'so' (cause → result) and 'because' (result ← cause), and they are not interchangeable in position.
Think of it this way: 'so' points forward to the result, while 'because' points backward to the cause. This means the cause must come before 'so,' and the result must come before 'because.' In Ji-yeon's situation, being tired is the cause, and not finishing homework is the result.
This is why B is correct. Version 2 places the cause first ("I was very tired last night") and uses 'so' to lead into the result ("I could not finish my homework") — perfectly structured. Version 3 places the result first ("I could not finish my homework") and uses 'because' to introduce the cause — also perfectly structured. Both sentences communicate the same logical relationship correctly.
A is wrong because it falsely claims 'so' can never connect these ideas — it absolutely can, as Version 2 demonstrates, as long as the word order is correct. C is wrong because it invents a rule that 'so' must follow the opinion or main statement — 'so' must follow the cause, not any specific type of statement. D is wrong because word order is not interchangeable; Version 1 reverses cause and result before 'so,' making it logically incoherent.
Your tip: always identify which idea is the cause and which is the result before choosing your connector — the connector and word order must match.
- Which single sentence revision MOST effectively transforms the student's three separate statements into one well-structured opinion sentence that uses connectors to clearly show reasoning and result?
Answer: I think watching TV before bed is bad for you because it makes it harder to fall asleep, so you feel tired the next morning.
When combining multiple ideas into one sentence, the key is matching your connectors to the logical relationship between each clause. Ask yourself: is the next idea a reason, a result, or a contrast? Using the wrong connector — even if the grammar feels smooth — creates faulty logic.
In the student's response, there are three distinct ideas with a clear logical chain: (1) watching TV before bed is bad → (2) because it makes sleeping harder → (3) so you feel tired the next morning. The relationship between ideas one and two is cause/reason ("because"), and the relationship between ideas two and three is result ("so"). Answer C captures this perfectly: "...bad for you because it makes it harder to fall asleep, so you feel tired the next morning." The connector "because" introduces the reason for the opinion, and "so" shows the resulting consequence — exactly matching the logical flow.
Answer A fails because it opens with "but," which signals contrast or contradiction. There is no contrast between the opinion and its reason — they support each other. Answer B uses "so" after the opinion, implying the opinion causes the difficulty sleeping, which reverses the logic entirely; the difficulty sleeping is the reason the opinion is held, not its result. Answer D is a classic grammar trap — it pairs "because" and "so" together in the same clause ("Because...so..."), which is a double connector error; these two words cannot both introduce the same subordinate clause.
A useful tip: whenever you revise for connectors, map out each idea's role first — reason, result, or contrast — then choose your connector to match.
