EX1: Chuyển câu chủ động sang câu bị động.
1. They have a warded Peter a prize for his essay.
2. how do people make candles ?
3. the pollution in the city is effeting people's breathing.
4. who inventedthe telephone ?
5. the garage is going to repair our car for us next week.
6. someone drew something on the wall.
EX2: Chia động từ.
1. i ( send ) a lot of candies by Peter last year.
2. an english speaking contest ( hold ) at my school next week.
3. i ( give ) an english book by my mother.
4. english ( speak ) all over the world.
5. who ( invent ) the bicycle ?
6. by whom the telephone invent ?
7. thousands people ( kill ) by the us.
8. we ( not allow ) to go out late when we were young.