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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,练习,1.A computer _ think for itself;it must be told what to do.,A.cant B.couldnt,C.may not D.might not,2.She has to answer for what she has done,_?,A.doesnt,she,B.hasnt,she,C.has,she,D.does,she,3.You _to the meeting this afternoon if you have something important to do.,A.neednt,B.neednt,to come,C.neednt,come,D.dont,need come,4.Look!what you have done.You _be more careful.,A.may,B.should,C.would,D.had,to,5.-Shall I tell John about it?,-,No,you,_.Ive told him already.,A.neednt,B.wouldnt,C.mustnt,D.shouldnt,6.She doesnt answer the doorbell.She _ be asleep.,A.might,B.ought,to,C.should,D.must,have,7._he _a famous doctor at that time?He was so young then.,A.Can;be,B.Must,;be,C.Can;have,been,D.Must;have,been,8.They _ the,plane,or,perhaps they have been prevented from coming for some reasons.,A.Can,have lost,B.may,have lost,C.can,have missed .,D.may,have missed,9.Johnny,you _ play with the knife,you _ hurt yourself.,A.wont;cant B.mustnt;may,C.shouldnt;must D.cant;shouldnt,10.I cant find Mary,anywhere.She,must _ her homework upstairs.,A.do,B.have,done,C.be,doing,D.have,been done,11.He _ if he works hard for the people.,A.shall,praise,B.shall,be praised,C.will,praise,D.will,be praised,12.Did he need _ then?,A.leave,B.leaving,C.left,D.to,leave,13.-Oh,Ive missed a good chance.,-Yes,you _ the job when it was _.,A.should have taken;offered,B.should take;offered,C.might have taken;offering,D.had taken;offered,14.-She must have gone back to the valley.,-_ she _.The entrance to it was nowhere to be found.,A.No;mustnt,B.Yes;might,C.Yes;could,D.No;couldnt,15.The professor gave orders that the experiment_before 5:30 P.m.,A be finished B will finish C must be finished D would be finished,16.There was plenty of time.You_.,A,mustnt,hurry B,mustnt,have hurried,C,neednt,hurry D,neednt,have hurried,17.I_a little earlier,but I met a friend of mine on the way.,A may come B may have come C could have come D must have come,18.He must have finished his homework,_he?,A,mustnt,B,didnt,C,neednt,D,hasnt,19.You _the trees.Look,it is raining now.,A,mustnt,have watered B,neednt,have watered,C could have watered D might have watered,20.The streets are all dry.It _during the night.,A,cant,have rained B must have rained,C,couldnt,rain D,shouldnt,have rained,21._you be happy!,A May B Can C Must D Would,22.You _miss the lesson,though we _have it on Thursday.,A,mustnt,neednt,B,neednt,mustnt,C,mustnt,mustnt,D,neednt,neednt,23.We_the work so early without your help.,A,couldnt,finish B,cant,finish,C,couldnt,have finished D,cant,have finished,24.“Would you come and join them?”,“I wish I_.But,Iam,busy at this moment.,A,cant,B,couldnt,C could D can,25.He_rather stay at home than go to the cinema with you.,A should B might,C would D had better,26.Its high time,we_to,the teacher.,A will B shall,C are going to D went,27.Its strange that,they_nothing,about this matter.,A know B would know,C knows D knew,28.I wish,you_go,with me tomorrow.,A will B would,C shall D can,29.-I,cant,get through to the general,managers,office anyhow.,-The line is busy.someone _the telephone.,A must use B uses,C must have been using D must be using,30.The young man insisted that he _nothing wrong and _free.,A,did;set,B had,done;should,be set,C,do;be,set D had,done;must,be set,
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