EX2:
4. They will hold the meeting before May Day.
- The meeting will be held before May Day
5. They have to repair the engine of the car.
- The engine of the car has to be repaired
6. The boys broke the window and took away some pictures.
- The window was broken and some pictures were taken away by the boys
7. People spend a lot of money on advertising everyday.
- A lot of money is spent on advertising everyday
8. They may use this room for the classroom.
- This room may be used for the classroom
9. The teacher is going to tell a story.
- A story is going to be told by the teacher
10. Mary is cutting the cake with a sharp knife.
- The cake is being cut with a sharp knife by Mary

EX1:
2. Tea is drunk in England
3. My car has to be repaired
4. Trees are being planted by the pupils
5. Tennis was being played at 4 p.m yesterday