3. The lights must be turned off before going out
4. My book has been taken
5. A story is going to told by the teacher
6. The meeting will be held before May Day
7. The cake is being cut by Mary
8. These trees were planted by my father yesterday
9. English is spoken in almost every corner of the world
10. His story is believed
11. The room was filled with smoke
12. Mr Cole used to be visited by John at the weekends
13. These exercises were done well