题目内容：

英语被动语态,高手来!
1.It's said(据说) that the long bridge__________（build）in two months．
2. Which language _______the most widely _______（speak）in the world?
3. The lost boy_____________（not find）so far．
4. .Last year a large number of trees________（cut）down．
5 The students _____ often _____(tell) to take care of their desks and chairs.
6. The old man is ill. He ______ (must send) to the hospital.
7. What _______ knives ______ (make) of ?
They_____(make) of metal(金属) and wood.
8. Can the magazine __ (take) out of the library?
11. The room _____(clean) by me every day.
12. The stars can’t ______ (see) in the daytime.
13. Some flowers __ (water) by Li Ming already.
14. The children will sing an English song. (改为被动语态)
An English song ___ ___ ____ by the children.
15. You needn't do it now. (改为被动语态)
It ______ ________ ________ by you now.
16. People use metal for making machines. (改为被动语态)
Metal ____ ____ ___making machines.
17. He made me do that for him. (改为被动语态)
I ___ ___ _____ ____ that for him.
18.They are watching the football match.
The football match ____ ___ ___ by them.
19.Did they build a bridge here a year ago? (改为被动语态)
___ a bridge ______ here by them a year ago?
20.They have sold out the light green dresses. (改为被动语态)
The light green dresses ___ ___ ____ out.
21.We call the game “Lian lian kan”. (改为被动语态)
The game ____ ____“Lian lian kan” by us.