turn the following sentences into passive 
----- Nội dung dịch tự động từ ảnh -----
50. The teacher won't correct exercises tomorrow.
51. Marry has operated Tom since 10 o'clock.
52. This is the second time they have written to us about this.
53. Mr. Smith has taught us French for two years
54. They didn't look after the children properly.
55. Nobody swept this street last week.
56. People drink a great deal of tea in England.
57. People speak English all over the world.
58. Tom was writing two poems.
59. She often takes her dog for a walk.
60. They can't make tea with cold water.
61. The chief engineer was instructing all the workers of the plan.
62. Somebody has taken some of my books away.
63. They will hold the meeting before the May Day.
64. They have to repair the engine of the car.
65. The boys broke the window and took away some pictures..
66. People spend a lot of money on advertising everyday.
67. They may use this room for the classroom.
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