Question

Bài này cx 2 trang luôn ạ

Answer 1

31 B

32 A

33 D

34 C

35 A

36 C

37 D

38 A

39 C

40 B

Answer 2

31 B

32 A

33 D

34 C

35 A

36 C

37 D

38 A

39 C

40 B

Answer 3

^{_{31. B}}

^{_{32. A}}

^{_{33. D}}

^{_{34. C}}

^{_{35. A}}

^{_{36. C}}

^{_{37. D}}

^{_{38. A}}

^{_{39. C}}

^{_{40. B}}