B can't
因为肯定的语气用must,否定要用can't ,而不能用mustn't
This key ___ be Peter's.His is still in the lock.
This key ___ be Peter's.His is still in the lock.
A.may not
B.can't
C.mustn't
D.needn't
选择原因?
A.may not
B.can't
C.mustn't
D.needn't
选择原因?
英语人气：462 ℃时间：2020-05-14 10:29:03
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