1. Letters are typed in the office by Mary.

2. You’ll be helped by his father tomorrow.

3. The human life has completely been changed with 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 my students.

10. I was sent a present last week.

$\text{1.}$Letters are typed  by Mary in the office

$\text{2.}$You will be helped by his father tomorrow

$\text{3.}$Human life has been completely changed by science and

technology

$\text{4.}$This bottle was broken by Peter

$\text{5.}$E is being learned in the room

$\text{6.}$My mind can’t be changed

$\text{7.}$I hadn’t been told about it

$\text{8.}$Her telephone number isn’t known

$\text{9.}$The children will be brought home by my students

$\text{10.}$A present was sent to me last week/I was sent a present lasr week

$\text{@TriLeCongTri}$

$\text{chúc em học tốt!!!!!!!!!}$