Exercise 2: Change the following sentences into passive voice.
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 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. I buy two newspapers and a magazine every day.
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7. My students will bring the children home.
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8. She gave us more information.
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9. We plant many flowers in the garden.
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10. The boys broke the window and took away some pictures.
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11. People spend a lot of money on advertising every day.
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12. Mary is cutting a cake with a sharp knife.
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13. The children looked at the woman with a red hat.
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14. They have provided the victims with food and clothing.
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15. They have changed the window of the laboratory.
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