问题

Someone isknocking at the door. Is it Ann— It _____ beher. She is giving a performance at the theatre now.

A: may
B: must
C:can’t
D:mustn’t

正确答案是：

同类题型

The poor man , ________,ran out of the dark cave. [ ]

Whenever I w_____ me.

There ________. And here ________.

55. I can’t see John anywhere. Where _____he have gone

Can you describe _____ it happened?　　　　—Yes, I was riding on my bike _____ a car knocked me down from behind