Question

【题目】— Who's that woman? Is it Ms. Li?
— It ______ be her. She has gone to Britain.
A.may
B.must
C.can't
D.mustn't

Answer 1

【答案】C
【解析】句意：——那女人是谁？是李老师吗？-——不可能是她。她去了英国。may可能；must必须，一定；can't不能，不可能；mustn't禁止，不允许。所以选C。