Once environmental damage（）, it takes long time for the ecosystem to recover._精华吧

Once environmental damage（）, it takes long time for the ecosystem to recover.

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Once environmental damage（）, it takes long time for the ecosystem to recover.

A.does

B.is to do

C.has done

D.is done

正确答案：is done

Tag：高职英语时间：2022-01-09 22:26:43

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