31. I will shut the door if you like.

=> The door will be shut if you like.

32. We have just seen a horrible accident

=> A horrible accident has just been seen.

 33. What language do people speak in this country?

=> What language is spoken in this country?

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

=> Cakes were being made by Mrs. Smith at 7p.m.

 35. He isn’t going to buy that house

=> That house isn't going to be bought by him.

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

=> 3 hostages have been kept by this terrorist for a week.

37. He hasn’t seen you for years.

=> You haven't been seen by him for years.

 38. The examiner will read the passage 3 times.

=> The passage will be read 3 times by the examiner.

39. An earthquake destroyed the town.

=> The town was destroyed by an earthquake.

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

=> The letter wasn't typed by him last night.

 41. They will pick me up at my house.

=> I was picked up at my house.