Chuyển câu chủ động sang câu bị động :
1, The statue broke while they were moving it to another room in the museum .
2, After he had told a story, we clapped our hands.
3, They had taken the victim to hospital before the polise came.
4, She hadn t informed me of the date of the meeting before another classmate of mine told me about it.
5, Had they pulled down the building to make way for a new road before you came back ?
6, Some had invented elctric lights before I was born.