1. All the letters are typed in the office by Mary.2. You will be helped by his father tomorrow.3. Human life has been changed by science and technology.4. This bottle was broken by Peter.5. English is being learnt in the room.6. My mind can't be changed.7. I hadn't been told about it.8. 2 newspapers and 1 magazine are bought everyday.9. The children will be brought home by my students.10. The room should be kept tidy.11. We were given more information.12. All the workers of plan were being instructed by the chief engineer.13. Many flowers are planted in the garden.14. Some of my books have been taken away.15. The meeting will be held before May Day.16. The engine of the car has to be repaired.17. The window was broken and some pictures were taken away by the boys.18. A lot of money is spent on advertising everyday.19. A story is goint to be told by teacher.20. A cake is being cut with a sharp knife by Mary.Câu trả lời: 1. All the letters are typed in the office by Mary.2. You will be helped by his father tomorrow.3. Human life has been changed by science and technology.4. This bottle was broken by Peter.5. English is being learnt in the room.6. My mind can't be changed.7. I hadn't been told about it.8. 2 newspapers and 1 magazine are bought everyday.9. The children will be brought home by my students.10. The room should be kept tidy.11. We were given more information.12. All the workers of plan were being instructed by the chief engineer.13. Many flowers are planted in the garden.14. Some of my books have been taken away.15. The meeting will be held before May Day.16. The engine of the car has to be repaired.17. The window was broken and some pictures were taken away by the boys.18. A lot of money is spent on advertising everyday.19. A story is goint to be told by teacher.20. A cake is being cut with a sharp knife by Mary.