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