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The cleaners must prevent the street ______.

A.getting dirty

B.from dirty

C.from get dirty

D.from getting dirty

 

【答案】

D

【解析】

试题分析:prevent sb from doing sth预防,阻止某人干某事,from是介词后面接名词或者动名词。故选D,清洁工必须防止大街变脏。

考点:固定短语prevent sb from doing sth

点评:prevent sb from doing sth预防,阻止某人干某事,from是介词后面接名词或者动名词。

 

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