chuyển thành câu bị động giúp mk vs ạ

.31. I will shut the door if you like.

32. We have just seen a horrible accident

 33. What language do people speak in this country?

 34. At 7 p.m., Mrs. Smith was making cakes.

 35. He isn’t going to buy that house

.36. This terrorist has kept 3 hostages for a week.

37. He hasn’t seen you for years.

 38. The examiner will read the passage 3 times.

39. An earthquake destroyed the town.

40. He didn’t type the letter last night.

 41. They will pick me up at my house.

 42. When did you see him in that bank?

 43. A man returned the keys to me.

 44. Mary will see her friends off at the station.

 45. They have to pull down that building.

 46. He gave me a knife to cut this bread.