参考答案：
1-5 bcdcc 6-10 cacbc
11. longer and longer
12. quite difficult
13. children
14. care and attention
15. normal, everyday life
16-20 cddab
21-25 baacb
26. (should)be
27. reasonable
28. proposal
29. are not allowed
30. eagerly
31. strength
32. had been produced
33. taking
34. is
35. to rise
36-40 dbdbd
41-45 dbcda
46. air conditioning system
47. engineering requirements
48. satisfactory
49. efficient
50. proposal
51-55 cl pd ma bk zo
56. christ church
57. marked private
58. picnicking
59. follow the advice
60. prevent crime
61-64 dccb
65——