Change sentences into the pasive ( present simple)

I. Change sentences into the pasive ( present simple) :
1. Mr Hai delivers the letters everyday.
-...........................................................................
2. The children often buy the tickets at the box office.
-...................................................................................
3. They usually finish their homework before bed time.
-...........................................................................................
4. The teacher corrects our exercises today.
-................................................................................
5. We often watch the shows of music on TV.
-............................................................................
6. We do a written test today.
-.....................................................
7. Everyone always see the Picasso's exhibition.
-.................................................................................
8. The workers clean the streets everyday.
-..............................................................................
9. Careless driving causes many accidents.
-..................................................................................
10. Weeds cover the river bank.
-.......................................................