Direction: Beneath each of the following sentences there are four choices marked A. B. C and D. Choose the best answer that completes the sentence.
1.The doctor will be free _______.
A. 10 minutes later B. after 10 minutes C. in 10 minutes D. 10 minutes after
2. Did you have trouble ______the post office ?
A. to have found B. with finding C. to find D. in finding
3.We offered him our congratulations ______ his passing the college entrance exams.
A. at B. on C. for D. of
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