问题

You don’t forget when we borrowed that reference book,do you? — I can’t remember now but___ sometime last week? [ ]

A: might it be
B: could it be
C: could it have been
D: should it have been

正确答案是：

同类题型

Young people must be ready take new challenges .

The old man made ______ clear that he wouldretire soon.

He________live in the south，so it is hard for him to________the climate here.[ ]

What are the children talking about They look so happy!—NBA games. They watched one______.

_______ you don’t stay out too late, you may go to theparty. But remember to be back here no later than 11:30 pm.