Question

    Read each sentence to find out whether there is any grammatical error in it. The error, if any, will be in one part of the sentence. Mark the part with the error as your answer. If there is no error, mark ‘No error’ as your answer (Ignore the errors of punctuation, if any).

    Water contamination has(1)/ become more serious(2)/

    since chemists have begun(3)/ to use new substances.(4)
    A 1 Correct Answer Incorrect Answer
    B 2 Correct Answer Incorrect Answer
    C 3 Correct Answer Incorrect Answer
    D 4 Correct Answer Incorrect Answer
    E No error Correct Answer Incorrect Answer

    Solution

    Solution: The sentence given in the question is correct: Water contamination has become more serious since chemists have begun to use new substances.

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