1. The mouse is caught by the cat.

2. The newspapers are delivers once a day.

3. English is spoken all over the world.

4. The monkeys are fed at the zoo  twice a day.

5. Fruits are grown in California.

6. That house was built.

7. That house was built in 1957 by Bob Smith.

8. The factory was opened at nine A.M.

9. All letters were posted yesterday.

10. Fifty people were invited to the party.

11. Last night our house was broken into.

12. This machine mustn't be used after 5.30 p.m by you.

13. This machine must be cleaned every time you use it.

14. Your car will be driven to London Tuesday.

15. You will be asked a lot of questions at the interview.

16. You will be sent your examination results when they are ready.

17. In this August, a new house will be built.

18. He can be given good marks by the teacher.

19. English cannot be learned very well by me.

Đáp án:

`1.` The mouse is caught by the cat.

`2.` The newspapers are delivers once a day.

`-` Dấu hiệu nhận biết thì HTĐ "once a day"

`3.` English is spoken all over the world.

`4.` The monkeys are fed at the zoo twice a day.

`-` Dấu hiệu nhận biết thì HTĐ "twice a day"

`5.` Fruits are grown in California.

`6.` That house was built.

`7.` That house was built by Bob Smith in 1957.

`-` Dấu hiệu nhận biết thì QKĐ "in 1957"

`8.` The factory was opened at nine A.M.

`9.` All letters were posted yesterday.

`-` Dấu hiệu nhận biết thì QKĐ "yesterday"

`10.` Fifty people were invited to the party.

`-` Cấu trúc câu bị động: 

`+` Thì HTĐ: S + am/is/are (not) + PII + (by  o)...

`+` Thì QKĐ: S + was/were (not) + PII + (by  o)...