We should do something to improve our environment.---Good idea.we can put up a sign__our classmate
not to waste paper.A ask B asked C asking D to ask选哪个？谢谢
人气：142 ℃ 时间：2019-10-24 20:19:36
解答
选D
We should do something to improve our environment.
---Good idea.we can put up a sign_to ask_our classmate not to waste paper.
表示目的,用to do不定式
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