1. 
=> The letters are delivered by Mr Hai every day 
2. 
=> The tickets are often bought by the children at the box office 
3. 
=> Their homework is usually finished before bed time 
4. 
=> Our execises are corrected by the teacher today 
5. 
=> The shows of music on TV are often watched 
6.
=> A written test is done today 
7. 
=> The Picasso's exhibition is always seen 
8.
=> The streets are cleane by the workers everyday 
9. 
=> Many accidents are caused by careless driving 
10. 

=> The river bank is covered by weeds 

1. Mr Hai delivers the letters everyday.
- The letters are delivered by Mr Hai every day 
2. The children often buy the tickets at the box office.
- The tickets are often bought by the children at the box office 
3. They usually  finish their homework  before bed time.
- Their homework is usually finished before bed time 
4. The teacher corrects our exercises  today.
- Our execises are corrected by the teacher today 
5. We often watch the shows of music on TV .
- The shows of music on TV are often watched 
6. We do a written test today.
- A written test is done today 
7. Everyone always see the Picasso’s exhibition .
- The Picasso's exhibition is always seen 
8. The workers clean the streets  everyday.
- The streets are cleane by the workers everyday 
9. Careless driving causes many accidents.
- Many accidents are caused by careless driving 
10. Weeds cover the river bank.

- The river bank is covered by weeds 

Chúc bn học tốt !!!!