题目内容

We have done what ______.So don’t panic any more.
A．is doingB．has doneC．is doneD．can be done
D

试题分析：原句意思是：能够做的我们已经做过了，因此不要再惊慌了。选项A. is doing正在做（主动语态）；B. has done已做了（现在完成时主动语态）C. is done被做（一般现在时被动语态）D. can be done能被做（含有情态动词的被动语态）。根据句意，故选D。
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