问题

Your English teacher looks very young; He _____ be over 30.
A:mustn't
B:can't
C:won' t
D:may not
B:can't
C:won' t
D:may not
正确答案是:
同类题型
I’m fond of my sister, but she has a serious shortcoming. She _______ be really stubborn.
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________you’ve got a precious chance, you might as well make full use of it.[ ]