PASSIVE VOICE
1. People know him well. He is known well
2. The teacher explains the lesson. The lesson is explained by the teacher
3. I want you to do this work now. You are wanted to do this work now by me
4. Nam does some exercises every day. Some exercises are done every day by Nam
5. The new teacher teaches English. English is taught by the new teacher
6. My father waters this flower every morning.
7. The waiter brings me this dish.
8. Our friends send these postcards to us. 
9. He lends his friend his new shoes. 
10. He hides the broken cup in the drawer. 
11. They carry those shelves to our library
12. People see John at the bus stop every morning
13. They put those newspapers on the reading table
14. He sells this book
15. They do an important research in this library