4

1 1 

2 2 

3 3 

4 4 

5 5 

6 6 

7 7 

8 8 

9 9 

10 10 

11 11 

12 12 

13 1:ss2 

14 2 

15 3 

16 4 

17 5 

18 6 

19 7 

20 8 

21 9 

22 10 

23 11 

24 12 

25 13 

26 14 

27 15 

28 16 

29 17 

30 18 

31 19 

32 20 

33 ss3 

34 2 

35 3 

36 4 

37 5 

38 6 

39 7 

40 8 

41 9 

42 10 

43 11 

44 12 

45 13 

46 14 

47 15 

48 16 

49 17 

50 18 

51 19 

52 20 

53 21 

54 22 

55 23 

56 24 

57 25 

58 26 

59 27 

60 28 

61 29 

62 30 

63 31 

64 32 

65 33 

66 34 

67 35 

68 36 

69 37 

70 38 

71 39 

72 40 

73 ss4 

74 2 

75 3 

76 4 

77 5 

78 6 

79 7 

80 8 

81 9: nghe bài trình chưa 