1. The letters are delivered by Mr.Hai everyday.
2. The tickets are often bought by the children at the box office.
3. The homework are usually finished by them before bed time.
4. Our exercises are corrected by our teacher today.
5. The shows of music on TV are usually watched by us.
6. A written test is done by us today.
7. The Picasso/s exhibition are always seen by everyone.
8. The streets are cleaned by the workers everyday.
9. Many acidents are caused by careless driving.
10. The river bank is covered by weeds.
Cấu trúc của câu hiện tại đơn bị động: S+is/are+V3/ed+O
