45 A to spending

46 C away

47 C Unless ( unless = if not )

48 C bill

49 B plumber ( thợ sửa ống nước )

50 D cracks ( vết nứt )

51 B Good idea!

52 A enormous

53 D cracks

54 D compare

55 B efficient

56 C for ( account for : chiếm tỉ lệ )

57 D natural resources

58 B seperate rooms

59 B That's a good idea !

60 D Great. Let's do that

II

25 A for ( look for: tìm kiếm )

26 C on ( spend ... on )

27 D installed ( lắp đặt )

28 C is

29 B polluted

30 D down ( turn down: giảm xuống)

31 A but

32 B because

33 A so

34 A but

35 D from ( hearing from )

36 B will stay

37 A used to go + Vinf : đã từng 

38 B because

39 D off

40 B reduce ( giảm )

41 A energy- saving bulb

42 C therefore

43 A Why don't we + Vinf

45.A
46.C
47.C
48.C
49.B
50.D
51.B
52.A
53.D
54.D
55.B
56.C
57.D
58.B
59.B
60.D
25.A
26.C
27.D
28.C
29.B
30.D
31.A
32.D
33.A
34.A
35.D
36.B
37.A
38.D
39.D
40.B
41.A
42.C
43.A
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