Answer:
1.the house was built in1902.
2.a cake is baked by her every Sunday.
3.the flower vase was broken by the little boy.
4.My school shoes were polished by me last Friday
5.the assignment was completed by us an hour ago
6.His car was stolen by the thieves.
7.All the fights were cancelled
8 the truth was told by pema
9.the clothes are always washes by her
10.the shopping is sometimes done by him.
11.the thief was arrested by the police
12.she was not beaten by me
13.a question would be asked by me
14.was the dog fed by you?
15.this experiment would be never forgotten by us.