Question

    A sentence has been divided into four parts, one of which may contain an error. Identify that fragment and mark it as your answer. Mark (E) if the sentence contains no error.

    Air pollution caused by industrial fumes (A)/ have been studied for years, (B)/ but only recently have (C)/ the harmful effects of noise pollution become known (D)/. No error (E)

    A A Correct Answer Incorrect Answer
    B B Correct Answer Incorrect Answer
    C C Correct Answer Incorrect Answer
    D D Correct Answer Incorrect Answer
    E E Correct Answer Incorrect Answer

    Solution

    The subject "Air pollution caused by industrial fumes" is singular, so the verb should also be singular. Therefore, "have" should be corrected to "has" to match the singular subject.

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