chuyển từ câu chủ động sang câu bị động:
1. they have to repain the engine of the can.
2.the boy broke the windown and took away some pictures
3. people spend a lot of money on adventising every day.
4. they may use thí room for the classroom
5.the teacher is going to tell a story
6.mary is cutting the cake with a sharp knife
7.the children looked at the women with ared hat
8.the have provided the victims with food and clothing