被动语态一般进行时怎么做?1. 结构→be + being + p.p.Eg:The mouse is being ca

被动语态一般进行时怎么做?
1. 结构
→be + being + p.p.
Eg:The mouse is being caught by the cat .
2.练习
1)This room __________ (clean) at the moment.
2)This question __________ (discuss) at the meeting.
3)A new railway ___________ (build) them now.
4)Look !A cake __________(make) my mother .
5)A car ________(drive) a little boy now.
6)A hamburger ____________ (eat) me at the moment.
7)Listen! An English song ___________(sing) by them .