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】

試題分析：prevent sb from doing sth預(yù)防，阻止某人干某事，from是介詞后面接名詞或者動名詞。故選D，清潔工必須防止大街變臟。

考點(diǎn)：固定短語prevent sb from doing sth

點(diǎn)評：prevent sb from doing sth預(yù)防，阻止某人干某事，from是介詞后面接名詞或者動名詞。

 

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