Choose the option that correctly completes the sentence:
He is one of the distinguished petroleum engineers who _____ contributed to the national pipeline integrity standard.
Answer and explanation
Correct answer: B. have
- Step 1: In the structure 'one of the [plural noun] who...', the relative pronoun 'who' refers back to the plural antecedent 'engineers'.
- Step 2: Therefore, the relative clause requires a plural verb: 'have contributed'.
Answer
have.
Why not the others: 'Has' is a common concord error that overlooks the plural antecedent 'engineers'.
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