Have you done ____ to improve the environment?A.something usefulB.anything usefulC.nothing usefulD.useful anything

Thank you for your lovely gift,____怎么选?A.you should do it B.you dont do it,pleaseC.you have done it already D.you shouldnt have done that 1.Tom ____ the accident ____ ____ ____ ____ (亲眼目睹）.He could tell you in detail.2.This ____ in a short time.We still have something more important to do.A.can't be done B.can done C.mustn't be done D.have been finished .3.Put the stone ____ ------I have washed clothes for you------Thanks.You needn't ______ it.I can ____ it.A.do;try B.do;manage C.have done;manage D.have done ;try can’t +have done don't feel bad if you have done your best Xiao Li,you shouldn't have done it. Have you done it yet?3问3答 I have‘t done it yet.I’ve already done it.【yes,I have done it】现在完成时句 should have done ,shouldn't have done.could have done,couldn't have done ——Did you punish him for that?　　——Yes,but I don't think I ____7．——Did you punish him for that?　　——Yes,but I don't think I ____.　　A.should have done so B.need to have done so　　C.should do that D.ought have done that Thank you for the lovely gift, .A. you should do itB. you don't do it, pleaseC. you have done it alreadyD. you shouldn't have done that You have done your job,______?A：didn't you B：have you C：haven't youD：did you could you tell us about what you have done and what you haven‘t done yet.怎么翻译? 区别shouldn't have done 和 needn't have done musn't have done can't have done用法区别 ____ hard work you have done!A.What B.How C.What a D.How a --What do you want to have ____ for the coming art festival?这里为什么用done You have done wrong to Mr.wang ____.（你要为此道歉）（which ） It was very kind of you to do the washing-up,but you____it A.must't have done B.wouldn't have doneC.mightn't have done D.needn't have done.各位热心网友,我这道题选D,