题目内容

【题目】Workers have been working through the night ________ the bridge safe.

A. made B. to make

C. being made D. having made

【答案】B

【解析】考查非谓语动词。句意:为了使桥安全工人们整夜地工作。此处用动词不定式作目的状语,故选B。

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