参考答案：1-5 BCDCC 6-10 CACBC11. longer and longer12. quite difficult13. children14. care and attention15. normal,everyday life16-20 CDDAB21-25 BAACB26. (should)be27. reasonable28. proposal29. are not allowed30. eagerly31. strength32. had been produced33. Taking34. is35. to rise36-40 DBDBD41-45 DBCDA46. Air Conditioning System47. engineering requirments48. satis factory49. efficient50. roposal51-55 CL PD MA BK ZO56. Christ Church57. marked Private58. picnocking59. follow the advice60. prevent crime61-64 DCCB65------------------