--- Look! John is running on the playground. --- No, it be him. He has already gone to Xiamen. A. mustn’t B. can’t C. may not
She got up early this morning _________ she could catch the first bus.
This year our school is __________ than it was last year.
One of the suspects is ____ schoolboy.
---May I go home right now? ---No, you____. You must finish your work first.
—This computer doesn't work. —Really?I'll have it _______tomorrow.