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9 C
10 D
11 B
12 A
13 A
14 C
15 B
16 C
17 B
18 C
19 D
20 C
21 D
22 C
23 D
24 D
56 If he doesn't change his way of living, he will meet a lot of troubles
57 Doing the homework is important
58 Peter is the most intelligent in this class
59 She is too young to get married
22. satisfied
23. considerate
24. generosity
25. proud
26. activist
27. generously
28. proud
29. unpolluted
30. preventing
31. Environmentalists
32. disappointing
33. complaint
34. conservation
35. disappointingly
36. environmentalists
37. unpolluted
38. Preventing
39. complaint
conservationists
considering
polluting
4 cry a lot anymore
5 used to study at this school
6 used to walk to school
7 is a famous singer
8 have very long hair anymore
9 used to be good boys
10 used to get up early
11 work on a farm anymore
12 take much morning exercises anymore
13 use to smoke a lot
14 use to spend a lot of money