Exercise 1: Chuyển các câu sau sang câu bị động 1. Our teacher wants us to prepare our lessons carefully. Our teacher ..................................................................................................................................................... 2. They expected me to finish my work early. They expected ................................................................................................................................................. 3. Is she making big cakes for the party? Are ................................................................................................................................................................... 4. The house needs cleaning. The house ....................................................................................................................................................... 5. It was impossible to preserve river water in the past. River ............................................................................................................................................................... 6. He made me stay outside yesterday. I ....................................................................................................................................................................... 7. The teacher let us go home early last week. We ................................................................................................................................................................... 8. He had the waiter carry the luggage home. He had ............................................................................................................................................................. 9. I got the postman to post the letter for me. I got ................................................................................................................................................................. 10. Turn on the lights! The lights ........................................................................................................................................................ 11. They know that English is an international language. English ............................................................................................................................................................ 12. Don't do that silly thing again. Don't let .......................................................................................................................................................... 13. We'll continue to use this phone. This phone ...................................................................................................................................................... 14. Did people make jeans two hundred years ago? Were ? 15. They opened the road 10 years ago. The road ..........................................................................................................................................................