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Something to save our earth. Do you think so? A.can do B. must do C. has to do D

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Something to save our earth. Do you think so? A.can do B. must do C. has to do D

Something ___ to save our earth. Do you think so?

A.can do   B. must do   C. has to do   D. must be done

试题答案

D

解析:

something must be done