5. The English grammar has been explained 

6. The accident was caused in this city 

7. His parents will be visited by him next month

8. The cecretary wasn't phoned 

9. Was this beautiful dressed by Mary ?

10. These old picture won't be hung in the living room

11. This factory was not built by the German during the Second World War

12. This house and these cars are going to be painted by the Greens for Christmas Day

13. The cats have been fed by Ann before she went to the cinema

14. The pollution problems have been discussed  since last week

*Nếu chủ ngữ không là ngôi ba số ít hay DT riêng thì không cần thêm by

5. The English grammar has been explained by our teachers

6. The accident was caused in this city by some drunk drivers

7. His parents will be visited by Tom next month

8. The cecretary wasn't phoned by manager this morning

9. Was this beautiful dressed by Mary ?

10. These old picture won't be hung in the living room

11. This factory wasn't built by the German during the Second World War

12. This house and these cars are going to be painted by the Greens for Christmas Day

13. The cats had been feld by Ann before she went to the cinema

14. The pollution problems have been discussed by the students since last week