Chuyển các câu sau sang bị động

EXERCISE 3: CHUYỂN CÁC CÂU SAU SANG BỊ ĐỘNG.

1. People believe that 13 is an unlucky number.

2. They know that English is an international language.

3. I have heard her sing this song several times..

4. People saw him steal your car.

5. They say that John is the brightest student in class.

6. Open your book. / let your book be opened

7. She advised me to sell that house.

8. It is dangerous for us to take the short cut..

9. They think that he has died a natural death. …

10. He won’t let you do that silly thing again.

11. He orders us to clean the floor.

12. You must see it to believe it.

13. People believe that the earth stood still.

14. People don’t make the children work hard

15. Don’t do that silly thing again.

16. They begged us to help him