Do you think the Labor Bill will be passed?

问题描述:

Do you think the Labor Bill will be passed?
Oh,yes.It's____that it will.
A.sure
B.surely
C.likely
D.certainly
为什么选C,A和D为什么不行?

it is likely that 是一个固定句型“很有可能.”
相当于 it is possible that
这句话的主语是it
如果想用sure 主语必须是人,如 I'm sure that
certain 的主语是it,但没有用certainly的