Trả lời nha

1. Letters are types in the office by Mary

2. You'll be helped by his father tomorrow

3. The human life has completely been changed

 Science and technology

4. This bottle was broken by Peter

5. English is being learnt in the room

6. My mind can't be changed

7. I hadn't been told about it

8. Her telephone number isn't know

9. The children will be brought home by my students

10. I was sent a present last week

            ---- Chúc bạn học tốt nha------

1. Letters are typed in the office.

2. You'll be helped tomorrow.

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

4. This bottle was broken by Peter.

5. English is being learnt in the room.

6. My mind can't be changed.

7. I hadn't been told about it.

8. Her telephone number isn't known.

9. The children will be brought home by the students.

10. I was sent a present last week.