21. Our English teacher doesn’t often give us much homework.

-> we aren't often given much homework by our english teacher

22. They build some new roads in each city every year.

-> some new roads are built in each city every year.

23. Our school often organizes camping activities on summer holiday.

->camping activities are organized by our school on summer holiday.

24. My mother often cooks delicious meals for us.

->delicious meals are often cooked for us by my mother.

25. My best friends often write emails.

->emails are often written by my best friends.

26. Mrs Hoa usually sells fresh vegetables in the market near my house.

->fresh vegetables are usually sold in the market near my house by Mrs Hoa.

27. Uncle Trung delivered milk in our village in the mornings last year.

->milk was delivered in our village by uncle Trung in the mornings last year.

28. Thousands of visitors visited Hue last summer.

->Hue was visited by thousands of visitors last summer.

29. The American didn’t make the Statue of Liberty.

-> the Statue of Liberty was made by the American.

30. Did Picasso design the Eiffel Tower in 1887?

->was the Eiffel Tower designed by Picasso in 1887?

31. They didn’t hold The Olympic Games in London in 2008.

->The Olympic Games weren't held in London in 2008.

32. Did those adventurers discover that island 500 years ago?

-> was that island discovered by those adventurers 500 years ago?

33. People invented the wheels thousands years ago.

->the wheels were invented thousands years ago. 

34. I didn’t buy that dictionary from the department store.

->that dictionary wasn't bought from the department store.

xin ctlhn