I. Chuyển các câu sau sang câu bị động
1. Mary types letters in the office.
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2. His father will help you tomorrow.
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3. Science and technology have completely changed human life.
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4. Peter broke this bottle.
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5. They are learning English in the room.
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6. Nothing can change my mind.
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7. No one had told me about it.
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8. I don’t know her telephone number
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9. My students will bring the children home.
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10. They sent me a present last week.
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11. She gave us more information.
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12. The chief engineer was instructing all the workers of the plan.
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13. They can’t make tea with cold water.
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14. Somebody has taken some of my books away.
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15. They will hold the meeting before May Day.
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16. They have to repair the engine of the car.
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17. The boys broke the window and took away some pictures.
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18. People spend a lot of money on advertising every day.
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19. Teacher is going to tell a story.
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20. Mary is cutting a cake with a sharp knife.
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21. The children looked at the woman with a red hat.
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22. They have provided the victims with food and clothing.
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23. People speak English in almost every corner of the world.
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24. You mustn’t use this machine after 5:30 p.m.
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25. After class, one of the students always erases the chalk board.
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