题目内容

Li Ming is so careful that he always looks over his exercise to_____ there are no mistakes.

A. look for B. find out C. end up D. make sure

D 【解析】句意“李明如此的仔细,以至于他总是检查他的练习确保没有错误”。A.寻找;B.查明;C.结束;D.确保。根据句意,故选D。
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