Answer:
1.Her mother was assisted by her.
2.Many pictures were drawn by her.
3.They were opposed by us.
4.The proposal was rejected by her.
5.Noise were made by them.
6.The drug was sampled by the doctor.
7.They were leaded by him.
8.A party will be arranged by me.
9.The bell will be rang by him.
10.The story will be narrated by her.
11.The accident will be described by him.
12.The money could be used by you.
13.The rules of health is not followed by me.
14.The book was not read by you.
15.Kites were not flown by me.
16.Flowers were not plucked by us.
17.The food was not cooked by him.
18.The money was not withdrawn by him.
19.The questions were not raised by her.
20.The flats were not painted by us.