1. heir work will be finished next week.
2. Considerable damage has been caused by the fire.
3. The suspects were being followed by the police.
4. The special cameras were not shown to me.
5. Her ticket was shown to the airline agent by her.
6. The dinner is being prepared by her mother in the kitchen.
7. Our teeth should be cleaned twice a day.
8. The English grammar has been explained by our teachers.
9. The accident in this city was caused by some drunk drivers.

Exercise 1: Change the sentences into the passive voice.

1. Their work will be finished next week.
2. Considerable damage has been caused by the fire.
3. Her ticket was shown to the airline agent by her.
4. The dinner is being prepared in the kitchen by her mother.
5. Our teeth should be cleaned twice a day.
6. The English grammar has been explained to us by our teachers. 
   The accident in this city was caused by some drunk drivers.