Change the following sentences from active into passive form.
1. Somebody has taken my briefcase.
2. The teacher returned our written work to us.
3. She had finished her report by soon.
4. The mad dog bit the little boy.
5. The police have arrested five suspects.
6. The doctor ordered him to take a long rest.
7 lightening struck the house.
8. A group of students have met their friends at the rail way station.
9. They didn’t allow Tom to take these books home.
10. The teacher won’t correct exercises tomorrow.