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35. He was busying writing a story, only ____ once in a while to smoke a cigarette.

A. to stop       B. to have stopped     C. stopping       D. being stopped

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34. -Mum, you always tell me that if I work hard, I will pass the exam.

-But you must admit that you ____, so far.

A. didn’t        B. hadn’t        C. haven’t      D. don’t

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