the problems / now.a:are discussing ; b; are being discussed.why?

问题描述:

the problems / now.a:are discussing ; b; are being discussed.why?

b 问题正在被讨论。

b
被动语态,问题是被讨论

应选B are being discussed

解析:问题是被讨论的,所以要用被动语态.又因为后面的now,所以要用现在进行时被动语态.

The problems are being discussed now.
这些问题正在讨论中.

b; are being discussed 问题在被人讨论 用被动