I. Chuyển câu chủ động sang câu bị động: 1. They sell jeans all over the world. .................................................. ........................................................... ................................. 2. They are building a new school in this town. ...................................................... ........................................................... ..................... 3. The clown made us laugh a lot. ...................................................... ........................................................... ...................................... 4. He finished his exercises on time. ……………………………………………………………… 5. People plant rice in those fields. ………………………………………………………………. 6. this boy broke my windows yesterday. ………………………………………………………… 7. did you do your test perfectly? ………………………………………………………………. 8. They have known him well. ………………………………………………………………. 9. They have postponed the concert. ……………………………………………………………… 10. My father bought me a video recorder. ………………………………………………………. 11. The police didn’t interview the witness. ………………………………………………………………….….............................. 12. They use cars and trucks to carry food to market. ……………………………………………………………………………………………. 13. They have built a new hospital near the airport. ……………………………………………………………………………………………. 14. He hasn’t seen the younger son for three weeks. ……………………………………………………………………………………………. 15. The secretary opens the mails every morning. ………………………………………………………… 16. No one has opened that box for the past hundred years. ……………………………………………………………………………………… 17. The fire has destroyed many houses. ………………………………………………………………… 18. The children are carrying the chairs into the house. ……………………………………………………………… 19. She cleans the floor every morning ………………………………………………………………………………… 20. He will solve the problem soon. ……………………………………………………………………………………… 21. She made a lot of mistakes in the examination. ……………………………………………………………………………………… 22. No one has locked the door. ………………………………………………………………………………………