Chuyển các câu sau sang câu bị động: 45. I would like to give Mary a nice present. → 46. Our teacher wants us to prepare our lessons carefully. → 47. It is your duty to lock all the doors. → 48. He suggested selling the radio → 49. Open your book, please! → 50. They advised enlarging the garden →

45. I would like to give Mary a nice present.

→I would like Mary to be given a present.

46. Our teacher wants us to prepare our lessons carefully.

→Our teacher wants our lessons to be prepared carefully.

47. It is your duty to lock all the doors.

→You are supposed to lock all the door.

48. He suggested selling the radio

→He suggested that the radio should be sold.

49. Open your book, please!

→Let your book be opened .

50. They advised enlarging the garden

→They advised that the garden should be enlarged.