- Of all the students in the advanced seminar, Fatima consistently produces _______ research papers.
Answer: the most thorough
When comparing one person or thing against a group of three or more, English requires the superlative form of an adjective, not the comparative. The superlative signals that someone ranks highest within an entire set. You can recognize this situation by phrases like "of all the students" — that "of all" is your key signal that you're dealing with a group comparison, which demands a superlative.
Here, Fatima is being compared against all the students in the seminar, so you need the superlative form: "the most thorough." Choice B is correct. Notice it also uses the adjective "thorough" to modify the noun "research papers," which is grammatically appropriate.
Choice A, "more thorough," is the comparative form, used when comparing only two things. Since we have a whole group of students, this form is grammatically wrong in this context. Choice C, "as thorough as," sets up a comparison of equality (e.g., "Fatima's papers are as thorough as Sara's"), but the sentence has no second item to complete that comparison — it's structurally incomplete. Choice D, "more thoroughly written," uses an adverb ("thoroughly") where an adjective is needed, and it's also comparative rather than superlative, making it doubly incorrect.
A useful tip: whenever you see phrases like "of all," "among all," or "in the group," immediately think superlative — "the most" or "-est." When you see a comparison between exactly two things, use comparative — "more" or "-er." Training yourself to spot these trigger phrases will help you answer adjective and adverb questions quickly and accurately on the ACCUPLACER.
- Marcus found the second exam _______ than the first one, even though he had studied for twice as long.
Answer: more difficult
When comparing two things in English, you need the comparative form of an adjective — not the superlative (which compares three or more things) and not an invented form. The key signal in this sentence is the word "than," which always signals a comparison between two items and requires the comparative degree.
For the adjective difficult, because it has three syllables, English forms its comparative by adding "more" in front of it: more difficult. This makes C the correct choice. It fits the structure perfectly: "more difficult than the first one."
Now let's look at why the other options fail. A, more hardly, is a double error — "hardly" is an adverb meaning "barely," not a form of hard used here as an adjective, and adding "more" to it creates a nonsensical phrase. B, most difficult, is the superlative form, used when comparing three or more items (e.g., "the most difficult of all five exams"). Using it with "than" is grammatically incorrect. D, difficulter, is simply not a word in English. You cannot add -er directly to long adjectives like difficult — that ending is reserved for short adjectives of one or two syllables (e.g., faster, kinder).
A reliable strategy: count the syllables. One or two syllables → add -er (smarter, simpler). Three or more syllables → use more/less (more comfortable, more difficult). And always pair the comparative with "than," never the superlative.
- Among the four candidates interviewed for the position, the hiring committee agreed that Yusuf was _______ qualified for the role.
Answer: the most highly
When comparing more than two things, English requires the superlative form of an adjective or adverb — not the comparative. The key signal here is "among the four candidates," which tells you multiple options are being ranked, so you need the superlative structure.
The correct choice is B, "the most highly." The word "qualified" is an adjective, so it needs an adverb to modify it — that adverb is "highly." Because you're comparing four candidates, "highly" must take its superlative form: "most highly." Notice also that the superlative always requires the article "the" before it, giving you the complete phrase the most highly qualified.
Here's why the other options fall short. A, "more highly," uses the comparative form, which is only appropriate when comparing exactly two things — not four. C, "the most high," attempts the superlative but uses the adjective "high" instead of the adverb "highly." Since "high" would be modifying another adjective ("qualified"), you must use the adverb form "highly." D, "higher," is a comparative adjective, which has two problems: it's comparative rather than superlative, and it's an adjective modifying another adjective, where an adverb is required.
A useful pattern to remember: whenever you see phrases like "among all," "of the three," or any group larger than two, immediately think superlative. Also watch for adjective-versus-adverb traps — if a word modifies an adjective, it must be an adverb (ending in -ly).
- The Amazon River carries _______ volume of water than the Nile, making it the largest river by discharge in the world.
Answer: a greater
When comparing two things in English, you need the comparative form of an adjective, not the superlative. The sentence compares the Amazon to the Nile — exactly two rivers — so watch for that two-item structure as your signal.
The word "than" is your clearest clue here. Whenever you see "than" in a sentence, you need a comparative form ("greater," "larger," "more beautiful"), not a superlative ("greatest," "largest"). Choice A, "a greater", correctly uses the comparative form of "great" and pairs naturally with "than" — a greater volume of water than the Nile. This is your answer.
Choice B, "the greatest", is the superlative form, which you'd use when ranking three or more items (e.g., "the greatest river in the world"). The sentence is comparing only two rivers, so superlative is wrong. Choice C, "a more great", is a grammar error — "great" is a one-syllable adjective, so it forms its comparative by adding -er ("greater"), not by using "more." Saying "more great" is like saying "more tall" instead of "taller." Choice D, "a greatest", combines the superlative with the indefinite article "a," which is incorrect — superlatives require "the," not "a," and again, the context demands a comparative anyway.
A quick tip: train yourself to spot the word "than" in any sentence. It almost always signals that you need a comparative (-er or "more + adjective"), never a superlative. This pattern appears frequently on the ESL Language Use exam.
- Imelda's presentation was _______ her professor had expected, and she received the highest grade in the class.
Answer: more impressive than
When a sentence compares two things using "than," you need a comparative adjective — the form that ends in -er or uses more before the adjective. The key is pairing the right structure with the right connecting word.
In this sentence, Imelda's presentation is being compared to what her professor expected — two specific things being measured against each other. That comparison requires more impressive than, making D the correct answer. The structure is clean: more + adjective + than + the second item being compared.
Here's why the other options fail. A, "more impressive of," uses the wrong preposition entirely — "of" is never used to connect the two sides of a comparison. B, "the most impressive than," mixes up two different comparison structures: the most impressive is a superlative (used when comparing three or more things, like "the best in the class"), but superlatives never pair with than. Mixing them together produces a grammatically broken phrase. C, "as impressive as," creates an equality comparison — it would mean her presentation matched her professor's expectations exactly. But the sentence tells us she received the highest grade, implying she exceeded expectations, so equality doesn't fit the meaning.
A helpful tip: watch for the two-part signals in comparison sentences. More...than signals that one thing surpasses another. As...as signals that two things are equal. The most signals a superlative among a group. On the ACCUPLACER, wrong answers often mix these patterns together — recognizing which signal belongs with which structure will save you from common traps.
- The new bridge design is _______ than the original plan, requiring fewer materials and less construction time.
Answer: more efficient
When comparing two things in English, you need a comparative adjective, not a superlative. The sentence contrasts the new bridge design with one other thing — the original plan — which is your key signal.
For multi-syllable adjectives like "efficient," you form the comparative by adding "more" before the adjective: more efficient. This makes A the correct answer. The sentence reads naturally: "The new bridge design is more efficient than the original plan," which logically connects to the contrast introduced by "than."
B) "most efficient" is a superlative form, used only when comparing three or more things (e.g., "the most efficient of all the designs"). Here, only two things are being compared, so this is wrong. C) "the most efficient" has the same problem — it's also superlative — and adding "the" makes it even more definitively about ranking among many options, which doesn't fit. D) "much efficiently" is grammatically incorrect because "efficiently" is an adverb, and adverbs don't follow linking verbs like "is." You need an adjective here, and "much efficiently" isn't a valid comparative construction in any context.
A helpful strategy: whenever you see the word "than" in a sentence, that's your trigger to look for a comparative form — words like more, less, better, faster, or -er endings. If "than" is present but the answer choice is superlative (most, -est), it's almost certainly a trap. Train yourself to spot "than" first, then evaluate the answer choices accordingly.
- The _______ the temperature drops overnight, the more ice will form on the roads by morning.
Answer: lower
When you see a sentence comparing two situations where one condition affects another proportionally, you're looking at the "the ___ , the ___" comparative structure. This pattern always requires the comparative form of an adjective or adverb — never the superlative.
The sentence uses the classic parallel construction: "The [comparative], the [comparative]." This structure expresses a proportional relationship — as one thing changes, so does another. Here, as temperature drops more, more ice forms. The correct word to complete this idea is A) lower, the comparative form of "low." It fits perfectly: "The lower the temperature drops... the more ice will form." Notice that "more" in the second clause is also a comparative form, confirming the pattern.
B) lowest is the superlative form of "low," used when comparing three or more things to identify an extreme (e.g., "January has the lowest temperatures of the year"). Superlatives don't work in this parallel comparative structure. C) more low is grammatically incorrect — "low" is a short, one-syllable adjective, so it forms its comparative by adding -er (lower), not by using "more." You use "more" only with longer adjectives like "more beautiful." D) most low makes the same error as C but uses the superlative "most" instead — doubly wrong because it's both the incorrect form type and the incorrect degree.
A helpful tip: whenever you see "The ___, the ___" in a question, immediately look for the comparative form (-er or more + adjective). If you see a superlative (-est or most), it's a trap.
- Although both paintings are valuable, critics consider the one completed in 1887 to be _______ of the two.
Answer: the more significant
When comparing exactly two things, English grammar requires the comparative form of an adjective, not the superlative. The comparative form typically ends in -er or uses the word more before the adjective. The superlative form (ending in -est or using most) is reserved for comparisons among three or more items. This question is specifically testing whether you can recognize that distinction.
The sentence compares exactly two paintings — the clue is the phrase "of the two." Because you're dealing with a pair, you need the comparative form. "More significant" correctly compares one of two things, making B the right answer. It also uses an adjective ("significant") to describe the painting, which logically modifies the noun.
Looking at the other choices: A uses "the most significant," which is the superlative form. Superlatives only work when comparing three or more items, so using it with "of the two" is a grammatical error. C, "more significantly," uses an adverb rather than an adjective. Since you need to describe the painting (a noun), you need an adjective — adverbs modify verbs, adjectives, or other adverbs, not nouns. D, "the signifier," changes the meaning entirely — a "signifier" is a noun referring to something that represents a concept, which makes no sense in context.
A quick tip to remember: always count what's being compared. Two items → comparative (more, -er). Three or more → superlative (most, -est). Watch for phrases like "of the two" or "between the two" as signals that you need the comparative form.
- Residents of the northern district reported that the new transit system was _______ reliable than the old bus service, despite costing significantly more.
Answer: no more
When comparing two things using a negative idea — saying something is equally bad or equally insufficient — English uses the phrase "no more" followed by an adjective. This construction means "not any greater than," implying the two things are equivalent in a disappointing or surprising way. That's exactly the situation here: residents expected the expensive new transit system to be better, but it wasn't.
"No more reliable" is the correct phrasing because it expresses that the new system's reliability was equal to (not greater than) the old bus service. It functions as a negative comparative, and the sentence's context — "despite costing significantly more" — signals that contrast perfectly. D is your answer.
Looking at the wrong choices: A) "any more" is missing the necessary negation. "Any more reliable" would suggest a question or condition ("Is it any more reliable?"), not a declarative statement about disappointing results. B) "not the most" uses a superlative structure, which compares three or more things and would require "the most reliable," but here only two systems are being compared — superlatives don't fit two-item comparisons. C) "not more" is grammatically close but sounds unnatural and incomplete in standard English. The idiomatic and natural form is "no more," which packages the negation directly into the comparison phrase rather than tacking "not" onto a separate word.
Your study tip: watch for two-item comparisons with a disappointing or surprising twist — "despite," "even though," or "although" are clues that "no more + adjective" is likely the right structure to reach for.
- The revised medication has _______ side effects than the original formula, according to the clinical trial results.
Answer: fewer
When comparing quantities of countable nouns, English uses specific comparative words — and choosing the wrong one is one of the most common grammar mistakes. The key question to ask yourself is: Can I count the individual items? Side effects are countable (one side effect, two side effects, three side effects), so you need a comparative word that works with countable nouns.
"Fewer" is the correct choice here (C) because it is the comparative form used with countable nouns when comparing two things. The sentence is comparing the revised medication to the original formula, so a comparative form is needed — and since "side effects" can be counted individually, "fewer" fits perfectly.
Choice A, "fewest," is the superlative form, meaning it compares three or more things and indicates the absolute minimum ("the fewest side effects of all medications tested"). The sentence only compares two formulas, so a superlative is inappropriate here. Choice B, "less," is the comparative form for uncountable (mass) nouns — things you cannot count individually, like water, time, or traffic. You would say "less pain" or "less fluid," not "less side effects." Choice D, "lesser," means "lower in importance or quality" and is not used for quantity comparisons at all — it would appear in contexts like "the lesser of two evils."
A simple study tip: ask yourself whether you can put a number in front of the noun. If you can say "five side effects," the noun is countable — use fewer. If you cannot (like "five water"), use less.
