问题

There is someone knocking at the door. Who_ it be—I’m not sure. It_ be a postman.

A:may; must
B:will; can
C:can; may
D:may; will;

正确答案是：

同类题型

Look! There __________ some bread on thebowl.

How is he getting along with his English?—_________ spoken English is concerned, he stands first in our class.[ ]

He the book to the library if he it tomorrow.

The child had only _____ slight temperature，but the doctor regarded the illness as serious enoughfor ____ hospital treatment．

I like to put everything so that I can find it easily