13. If the government had built more homes for the poor several years ago, the housing problems now ______ so serious in many parts of the country.

　　A. wouldn’t be

　　B. won’t be

　　C. will not have been

　　D. would not have been

　　14. Tom might have come to school in time for the lecture ______.

　　A. if he got up earlier

　　B. unless he had got up earlier

　　C. but he got up rather late

　　D. but he had gotten up late

　　15. They took the injured straight to the hospital. Otherwise some of them ______.

　　A. might have died

　　B. might die

　　C. would die

　　D. could die

　　16. It is a perfect fit, sir. I ______ to you otherwise.

　　A. wouldn’t show it

　　B. wouldn’t have shown it

　　C. wouldn’t take it

　　D. wouldn’t have taken it

　　17. Jeff looked as if he _______ a ghost.

　　A. saw

　　B. has seen

　　C. had seen

　　D. would see

　　18. I would have gone to the concert, if I ______ time.

　　A. had had

　　B. have had

　　C. had

　　D. would have had

　　19. ______ I known it, I would have told you.

　　A. Have

　　B. If

　　C. Had

　　D. Having

　　20. The headmaster required that all the teachers ______ at the meeting.

　　A. present

　　B. must be present

　　C. be present

　　D. would be present

　　21. The mother rejected my suggestion that she ______ her daughter the next week.

　　A. met

　　B. meets

　　C. would meet

　　D. meet

　　22. It is necessary that anyone ______ exercises every day if he wishes to keep healthy.

　　A. do

　　B. would do

　　C. did

　　D. will do

　　23. It is high time that we ______ all ready for this afternoon meeting, ______it would be late.

　　A. must get, or

　　B. got, or

　　C. should get, and

　　D. get, and

　　24. In spite of the noise, he went on working ______ nothing were happening.

　　A. as if

　　B. because

　　C. although

　　D. where

　　参考答案：

　　1. B 2. D 3. A 4. A 5. A 6. B 7. B 8. A 9. C 10. A 11. B 12. D 13. A

　　14. C 15. A 16. B 17. C 18. A 19. C 20. C 21. D 22. A 23. B 24. A