Question
When he looked back, (A)/the professor understood that
(B)/he spent most of his life to teach (C)/at the middle school (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. If there is no error, mark ‘No error’ as your answer (Ignore the errors of punctuation, if any).Solution
Here, instead of ‘to teach’, the gerund ‘teaching’ should be u sed. When he looked back, the professor understood that he spent most of his life teaching at the middle school.
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