what has been done can not be undone

What ____ with the clothes?A.has been done B.has done C.have done D.have been done what( )with the old books?a.has been done b.has done c.have been done d.have done 为何用被动语态 what done has been done has been done?在说说他的结构是什么时态? I am sure Mary has been here and _.A.did what required her B.has done what required her C.has done what was required of her D.did what has been required of her为啥选C啊 what has ___has been done?A been doneB to be done C to doD done句子翻译还有为什么选那个?能不能说明下 为什么。 _ can be done has been done.A.All B.All that C.All what D.Anything 定语从句练习All___should be done has been done. A.what B.which C.that D.whatever I am satisfied _ should be done has been already done.A.what that B.what C.that what Dthat,选什么? what do you think__to protect our environment in the past few year?A to do B was done C has been done D have done what has been done can not be undone It's no use regretting what has been done. what has been done with the old books ? America has never been about what can be done for “I never see what has been done ,I only see what remains to be done. 4.Little has been done is helpful to our work.A.that B.what C.which D.all that. what had been done had been done. 19.All that can be done .　　A.have been done B.have done C.has been done D.has done顺便,翻译一下这句话吧 Much___to fight against pollution.A.have been done B,has been done C,had been done D.has done为什么是选B?