Passive voice and active voice

VI. Passive voice and active voice
1. They saw that boy go out
2. Betty has just sent Mary many postcards
3. Do they have to grow grass?
4. People call him pop singer
5. why didn’t they  turn on the lights?
6. Where do people speak English?
7. someone will tell him that news
8. people saw him steal your car
9. The teacher is watching them work
10. Open your book
11. Take off your hat.
12. they made him work all day.
13. someone should look into the matter
14. He likes people to call him “sir”
15. He wants someone to take some photographs