A.Chuyển sang câu bị động
1.To Hoai wrote many stories
-> many stories.........................................
2.When đi you study english ?
->When..............................................
3.They were building this house at this time yesterday
->This house.................................................
4.Are they making a cake now ?
-> Is.................................
5.They have study English for 10 years
-> English............................................
6. My parents used to take me to the zoo
-> I..........................................