【正文】 5. If my lawyer _____ here last Saturday, he _____ me from going. A. had been。 would have prevented( ) 6. He _____ you more help, even though he was very busy. A. might have given B. might have C. may have given D. may give( ) 7. If it _____ for the snow, we _____ the mountain yesterday. A. were not。 could climb( ) 8. Without electricity human life _____ quite difficult today. A. is B. will be C. would have been D. would be( ) 9. A puter _____ think for itself, it must be told what to do. A. can’t B. couldn’t C. may not D. might not( ) 10. Jenny _____ have kept her word. I wonder why she changed her mind. A. must B. should C. need D. would( )11. We _____ last night, but we went to the concert instead.A. must have studied B. might study C. should have studied D. would study( ) 12. — Could I borrow your dictionary? — Yes, of course you _____. A. might B. will C. can D. should( ) 13. Tom ought not to _____ me your secret, but he meant no harm. A. have told B. tell C. be telling D. having told( ) 14. — If he _____, he _____ that food. — Luckily he was sent to the hospital immediately. A. was warned。 had not taken( ) 15. Peter _____ e with us tonight, but he isn’t very sure yet. A. must B. may C. can D. will( ) 16. I told Sally how to get here, but perhaps I _____ for her. A. had to write it out B. must have written it out C. should have written it out D. ought to write it out( ) 17. I didn’t see your sister at the meeting. If she _____, she would have met my brother. A. has e B. did e C. came D. had e( ) 18. — Shall I tell John about it? — No, you _____. I’ve told him already. A. needn’t B. wouldn’t C. mustn’t D. shouldn’t( ) 19. When a pencil is partly in a glass of water, it looks as if it _____. A. breaks B. has broken C. were broken D. had been broken( ) 20. It’s nearly seven o’clock. Jack _____ be here at any moment. A. must B. need C. should D. can( ) 21.— There were already five people in the car but they managed to take me as well. — It _____ a fortable journey. A. can’t be B. shouldn’t be C. mustn’t have been D. couldn’t have been( ) 22. Johnny, you _____ play with the knife, you _____ hurt yourself. A. won’t。 shouldn’t( ) 23. The fire spread through the hotel very quickly but everyone _____ get out. A. had to B. would C. could D. was able to( ) 24. — When can I e for the photos? I need them tomorrow afternoon. — They _____ be ready by 12:00. A. can B. should C. might D. need( ) 25. — I stayed at a hotel while in New York. — Oh, did you? You _____ with Barbara. A. could have stayed B. could stay C. would stay D. must have stayed( ) 26. — Will you stay for lunch? — Sorry, _____. My brother is ing to see me. A. I mustn’t B. I can’t C. I needn’t D. I won’t( ) 27. — Are you ing to Jeff’s party? — I’m not sure. I _____ go to the concert instead. A. must B. would C. should D. might( ) 28. — Write to me when you get home. — _____. A. I must B. I should C. I will D. I can( ) 29. I was really anxious about you, you _____ home without a word. A. mustn’t leave B. shouldn’t have left C. couldn’t have left D. needn’t leave( ) 30. — Is John ing by train? — He should, but he _____ not. He likes driving his car.A. must B. can C. need D. may 專項練習（二）1. I didn’t see her in the meeting room this morning. She _____ at the meeting.A. mustn’t have spoken B. shouldn’t have spokenC. needn’t have spoken D. couldn’t have spoken2. One ought _____ for what one hasn’t done.A. not to be punished B. to not be punishedC. to not punished D. not be punished3. If you really want yourself to be in good health, you must ___ always ___ so much.A. not。 smoking4. With so much work on hand, you _____ to see the game last night.A. mustn’t go B. shouldn’t go C. couldn’t have gone D. shouldn’t have gone5. Most of the students felt rather disappointed at the English party. They say that it ______ better organized.A. had been B. had to be C. must have been D. could have been6. I’m surprised that he _____ in the exam.A. should fail B. would have failed C. may have failed D. should have failed7. The little girl _____ there alon