问题
31. The room is in a terrible mess; it _______ cleaned.
A:can’t have been
B:shouldn’t have been
C:mustn’t have been
D:wouldn’t have been
B:shouldn’t have been
C:mustn’t have been
D:wouldn’t have been
正确答案是：
同类题型
The men got out and pushed the bus . But it ____ move , not one bit .
What disappointed us was that their determination finally ___.
My friend has the same haircut _______I do.
My uncle’splane ____. Let’s wait for him here.
一Your brother is very careful and honest．一I agree．What he has just done_______itself．