Viết lại các câu sau

37. People must not leave their bikes in the hall.

38. You shouldn’t leave these documents on the desk.

39. We can see those mountains from a great distance.

40. They feed the seals at the zoo twice a day.

41. They asked me some difficult questions at the interview.

42. I am going to move my things next week.

43. They believe that the Chinese invented gunpowder. (2)

44. They didn’t look after the children properly.

45. Why did no one inform me of the change of the plan?
SOS