Question:

Instructions: In each of these questions, each sentence has four words or phrases in braces marked A, B, C and D. Choose one word or phrase that must be changed for the sentence to be correct.

Drug abuse {have} (A) become {one of} (B) our {most} (C) serious social {problems}. (D)

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Check subject-verb agreement first, drug abuse is singular.
Updated On: Jul 16, 2026
  • A
  • B
  • C
  • D
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The Correct Option is A

Solution and Explanation

This question tests subject-verb agreement, a frequently tested error-spotting area in SNAP General English.

  1. A - "have": The subject of the sentence is "drug abuse," a singular, uncountable noun phrase. A singular subject needs a singular verb, "has," not "have." This is the error.
  2. B - "one of": This phrase is grammatically fine here, "one of our most serious social problems" is a standard construction with no agreement or usage issue.
  3. C - "most": "Most serious" is the correct superlative form modifying "problems," there is nothing wrong with this phrase.
  4. D - "problems": The plural noun "problems" is correct since it follows "one of our most serious social," a standard "one of the + plural noun" pattern.

The corrected sentence reads: "Drug abuse has become one of our most serious social problems." The error lies in part A, making option A the correct answer.

Let's summarize:

  • Always check whether the main verb agrees in number with its subject, singular subjects like "drug abuse," "the team," or "everyone" take singular verbs.
  • Don't get distracted by superlative or "one of the + plural" constructions elsewhere in the sentence if they are already grammatically sound.

Reading the sentence with each bracketed part slightly emphasized helps the ear catch the mismatch quickly.

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