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know.A. can B. may C. need D. shall15. We hope that as many people as possible ________ join us for the charity show tomorrow.A. need B. can C. must D. should16. —Let’s go to the concert tonight, Michael!—Sorry, I _______. I have to help my mother with the houseworkA. mustn’t B. may not C. needn’t D. can’t17. If the traffic light is red, you ________ cross the road. It’s very dangerous.A. don’t B. mustn’t C. needn’t D. wouldn’t18. —I have spent too much time playing puter games these days.—I think so. You _____ stop, for your study and your health.A. will B. must C. can D. may19. We ________ fight against pollution.A. may B. should C. mustn’t D. needn’t20. —I can’t give up smoking, doctor.—For your health, I’m afraid you ________.A. may B. can C. have to D. must21.He did not regret saying what he did but felt that he it differently.A. could express B. would express C. could have expressed D. must have expressed22. Mr. White _____ at 8:30 for the meeting, but he didn39。t show up.A. should have arrived B. should arrive C. should have had arrived D. should be arriving23. —She looks very happy. She ______ have passed the exam.—I guess so. It’s not difficult after all.A. should B. could C. must D. might24. —Catherine, I have cleaned the room for you.—Thanks. You______it. I could manage it myself.A. needn39。t do B. needn39。t have done C. mustn39。t do D. shouldn39。t have done25. —It’s the office! So you_____know eating is not allowed here.—Oh, sorry.A. must B. will C. may D. need26. Some people who don’t like to talk much are not necessarily shy。 they _______ just be quiet people.A. must B. may C. should D. would27. 一What does the sign over there read?一No person ______ smoke or carry a lighted cigarette, cigar or pipe in this area.A. will B. may C. shall D. must28.Although the climate in our city is good, yet the temperature________fall to 14 centigrade below freezing point in winter.A. should B. shall C. can D. may29. —Can I know your plans for this summer holiday?—Mm...of course!But I39。m just thinking about this. I________be a volunteer social worker.A. might B. should C. must D. need30. —Mum, would you please buy me a MP5 player?—If you can help do the dishes the whole vacation, you have one as a rewardA. must B. need C. would D. shall31. When we worked in the same firm several years ago, we _____ often go to the cinema together.A. would B. will C. shall D. could32. Youget a new bicycle as a reward for doing well in the following final exam.A. must B. will C. shall D. should33. The young man has made so much noise that he________not have been allowed to attend the concert.A. could B. must C. should D. need34. —I wonder if I ________ smoke here.—No, you ________. You see, there is a “NO SMOKING” sign here.A. may。 needn39。t B. must。 can39。t C. shall。 won39。t D. can。 mustn39。t35. The children________ play football on the road.A. can39。t B. can C. mustn39。t D. must8