Change the following sentences into passive voice.
1.They can’t make tea with cold water.
2. The chief engineer was instructing all the workers of the plant.
3. Somebody has taken some of my books away.
4. They will hold the meeting before May Day.
5. They have to repair the engine of the car.
6. The boys broke the window and took away some pictures.
7. People spend a lot of money on advertising everyday.
8. They may use this room for the classroom.
9. The teacher is going to tell a story.
10. Mary is cutting the cake with a sharp knife.
11. The children looked at the women with a red hat.
12. They have provided the victims with food and clothing.
13. The teacher explains the lesson.
14. Mrs Green is cooking the food in the kitchen.
15. The doctor examined the patients.
16. These boys made that noise.
17. People speak English all over the world.
18. He gave him back the money last Sunday.
19. I can't do these exercises quickly.
20. She had finished the report by noon.