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.

11 We were given more information.

12 All the workers of the plan were being instructed by the chief engineer.

13 Tea can’t be made with cold water.

14 Some of my books have been taken away.

15 The meeting will be held before May Day.

I.

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

$\text{2.}$ 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.

$\text{5.}$ English is being learnt 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 phoned by me.

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

$\text{10.}$ A present was sent me last week.

$\text{11.}$ More information were given us by her.

$\text{12.}$ All the workers of the plan were being instructed by the chief engineer.

$\text{13.}$ Tea can't be made with cold water.

$\text{14.}$ Some of my books have been taken away.

$\text{15.}$ The meeting will be held before May Day.