Question

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

Answer 1

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

Answer 2

C

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