Chuyển thành câu bị động 1. No one knows him because he is too famous 2. Hung does not write two letters for his friends every month 3. Students are not making many noises in the class 4. They will not make a birthday party for their son next week 5. He has not just cooked a meal for family 6. She is not studying her lessons now 7. I cannot do this test very well 8. Mr. John has not drawn twenty pictures for all his life 9. Manh and Nam are not drawing a picture now 10. He did not use to drive his car to work last year 11. I will not see the dentist to check my teeth next week 12. She does not take her umbrella in case it will rain 13. Hai does not water the flowers every morning 14. She cannot see a small on object in the far distance