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    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.

    Before sleeping, (A)/you should make sure (B)/that you

    have locked all doors, (C)/preventing theft (D).
    A Before sleeping Correct Answer Incorrect Answer
    B you should make sure Correct Answer Incorrect Answer
    C that you have locked all doors Correct Answer Incorrect Answer
    D preventing theft Correct Answer Incorrect Answer

    Solution

    Here, ‘preventing’ is incorrect. Instead, ‘to prevent’ should be used. Before sleeping, you should make sure that you have locked all doors, to prevent theft.

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