1.The teacher told us to work harder on english pronunciation

→ We were told to work harder on english pronunciation by the teacher.

2. We must pay the bill at once

→ The bill must be paid at once.

3. I will repair your bicycle tomorrow afternoon

→ Your bicycle will be repaired tomorrow.

4. Penicillin can cure many dangerous diseases

→ Many dangerous diseases can be cured by penicillin.

5. Does your country export rice to Britain ?

→ Is rice exported to Britain by your country ?

6. Clement Clarke Moore wrote the peom in 1823

→ The poem was written by Clement Clarke Moore in 1823.

7. They should send Christmas cards a week before Christmas day

→ Christmas card should be sent a week before Christmas day.

8. Nobody has used this machine for years

→ This machine hasn't been used for years.

9. They use recycled plastic to make toys and utensils.

→ Recycled plastic is used to make toys and utensils.

10. You can buy tax free goods before you get on the plane

→ Tax free goods can be bought before you get on the plane.

11. The repairman is going to repair my car next week

→ My car is going to be repaired by the repairman next week.

12.They can make tea with boiled water.

→ Tea can be made with boiled water.

13. He is instructing all the workers of the plan at the moment

→ All the workers are being instructed of the plan at the moment.

14. A boy has just taken some of my books away.

→ Some of my books have just been taken away by a boy.

15. They will hold the celebration before January.

→ The celebration will be held before January.

< Chúc bạn học tốt >

1. we were told to work harder on english pronunciation by the teacher                                                  2. the bill must be paid at once                                                                                                                    3. your bicycle will be repaired tomorrow afternoon                                                                                  4. many dangerous diseases can be cured by penicillin                                                                              5. is rice exposted to britain by your country                                                                                              6.  the poem was written by clement clarke moore in 1823                                                                        7. christmast cards should be sent a week before christmas day                                                                8. this machine hasn't been used for years                                                                                                  9. recycled plastic is used to make toys and utensils                                                                                  10. tax free goods can be bought before you get on the plane                                11. my car is going to be repaired by the repairman next week                                                        12. tea can be made with boiled water                                                                                                     13. all the workers of the plan is being instructed at the moment                                                            14. some of my books has been just taken away by a boy                                                                       15. the celebration will be held before january