Giúp mình với mình vội lắm

11. The keepers were feeding the lions.

=> The lions were being fed by the keepers.

12. They have taken her to the hospital.

=> She has been taken to the hospital.

13. They had fastened his whole body to the ground.

=> His whole body had been fastened to the ground.

14. The school boys had wasted a lot of time.

=> A lot of time had been wasted by the school boys.

15. We write letter to our friend once a week.

=> Our friend is written letter once a week.

16. We clean the garages everyday.

=> The garagaes are cleaned everyday.

17. Someone has given him a lot of money

=> He has been given a lot of money.

18. The police arrested two hundred people.

=> Two hundred people were arrested by the police.

19. We export this computer to seventy different countries.

=> This computer is exported to seventy different countries.

20. They have cancelled the meeting.

=> The meeting has been cancelled.

21. We have invited all the students in the school.

=> All the students have been invited in the school.

22. They posted all the letters yesterday.

=> All the letters were posted yesterday.

23. The police found two children in the forest.

=> Two children were found in the forest by the police.

24. They will hold a meeting before May Day.

=> A meeting will be held before May Day.

25. Mary is cutting the cake with a sharp knife.

=> The cake is being cut with a sharp knife by Mary.

26. The teacher is going to tell a story.

=> A story is going to be told by the teacher.

27. An earthquake destroyed the town.

=> The town was destroyed by an earthquake.

28. He didn’t type the letter last night.

=> The letter wasn't typed by him last night.

29. They will pick me up at my house.

=> I will be picked up at my house.