Làm giúp mình những bài này

31. B

32. A

33. C

34. D

35. D

36. Although I was tired, I couldn't sleep.

37. The planet which is closest to the Earth, is Venus.

38. An ambulance has just been sent to the school.

39/ They told me that there were flights from Nha Trang to Ha Noi twice a week.

40. Nam told Hoa not to interrupt him while he was speaking.