答案：1. supposed 2. pour 3. contribution 4. green 5. made

　答案：1. dirtier, dirtier 2. burning 3. Businessmen 4. pleasant 5. useful

UNIT3

习题精选

　1. A. felt B. to feel C. feeling D. feel 　2. A. difficult B. wrong C. right D. small 　3. A. have died B. die C. died D. will die 　4. A. much B. more C. lot D. most 　5. A. still B. already C. yet D. even 　6. A. will B. often C. fast D. hard 　7. A. what B. who C. which D. that 　8. A. needn't B. wouldn't C. couldn't D. musn't 　9. A. Because B. If C. Whether D. Though 　10. A. also B. nor C. either D. too

　答案：1. D 2. B 3.C 4. D 5. A 6. A 7. D 8. C 9. B 10. C

　答案：much, go, haven't surfed, how, to, show, for, more, practice

　答案：1. have, I 2. What, kind, of 3. Have, you, yet 　4. Both, and, won 5. how, to, mend 6. neither, nor

　答案：1. B 2. A 3. C 4. D 5. A 6. B 7. D 8. C 9. B 10. B 11. A 12. B 13. D 14. D 15. D 16. B 17. A 18. B 19. C 20. C

　答案：1. the highest 2. waiter 3. excited, exciting 4. beaches 5. riding 6. tourists