题目内容
【题目】We must do everything we can _______ waste water from running into rivers.
A.keep
B.kept
C.to keep
D.keeping
【答案】C
【解析】查不定式的用法。动词不定式短语作目的状语,故选C
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题目内容
【题目】We must do everything we can _______ waste water from running into rivers.
A.keep
B.kept
C.to keep
D.keeping
【答案】C
【解析】查不定式的用法。动词不定式短语作目的状语,故选C