*PASSIVE VOICE 1. Mary types letters in the office. 2. His father will help you tomorrow. 3. Science and technology have changed human life. 4. Peter broke this bottle yesterday. 5. My mother had met my old teacher. 6. People speak English in almost every corner of the world. 7. Lan doesn't cook dinner every day. 8. they will visit HCM city next month. 9. somebody had cleaned my shoes before I came.

1 . Letters are typed in the office by Mary

2 . You will be helped by his father tomorrow

3 . Human life has been changed by science and technology

4 . This bottle was broken by Peter yesterday

5 . My old teacher had been met by my mother

6 . English is spoken in almost every corner of the world

7 . Dinner isn't cooked by Lan everyday

8 . HCM city will be visited next month

9 . My shoes had been cleaned before I came

Đáp án:

1. Letters are typed in the office by Mary.

2. You will be helped by his father tomorrow.

3. Human life has been changed by science and technology.

4. This bottle was broken by Peter yesterday.

5. My old teacher had been met by my mother.

6. English is spoken in almost every corner of the world.

7. Dinner isn't cooked by Lan everyday.

8. HCM city will be visited next month.

9. My shoes had been cleaned before I came.