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

試題分析：原句意思是：能夠做的我們已經(jīng)做過了，因此不要再驚慌了。選項A. is doing正在做（主動語態(tài)）；B. has done已做了（現(xiàn)在完成時主動語態(tài)）C. is done被做（一般現(xiàn)在時被動語態(tài)）D. can be done能被做（含有情態(tài)動詞的被動語態(tài)）。根據(jù)句意，故選D。
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