III. Change into passive voice: 1. For centuries, poets, writers, and musicians have mentioned the ao dai poems, novels and songs.
For centuries, Ao dai has been mentioned in poems, novels, and songs by poets, writers, and musicians
2. You must do your homework at home.
3. They grow rice in tropical countries.
4. They will make a new style of car in Japan.
5. Students in secondary schools should wear uniforms.
6. People speak English all over the world.
7. They sell jeans all over the world. Jeans
8. They have built two department stores this year.
9. The doctor has operated on Tom since 10 o’clock.
10. A man returned the keys to me.
11. They made jean cloth completely from cotton in the 18th century.
12. The teacher won’t correct the exercises tomorrow.
13. My cousin will meet you at the station.
14. He can’t repair my bike.
15. We can solve the problem.
16. You must do this exercise carefully.
17. People should stop experiments on animals.
18. We might find life on another planet.
19. We have to improve all the schools in the city.
20. They are going to build a new bridge in the area.