将英语句子改为被动语态（帮帮忙吧...）1.the pupils asked the teacher to tell a story2.Children often sing this song3.people all over the world know the Great Wall4.John can answer all the questions

1. The teacher was asked to tell a story ( by the pupils).
2. This song is often sung by children.
3. The great Wall is known all over the world.
4. All the questions can be answered by John.

1,The teacher was asked to tell a story by the pupils.
2,This song is ofen sung by children.
3,The Great Wall is known by people all over the world.
4,All the questions can be answered by John.

1.the teacher was asked to tell a story by the pupils 2.this song is often singed by children3.the Great Wall is known by people all over the world 4.all the questions can be answered by John 主动变被...