题干
—Is the man over there your new teacher?
—No, it _______ be him. He has gone to Shanghai for a meeting.
A：needn't
B：mustn't
C：can't
D：must
答案(点此获取答案解析）
C
—Is the man over there your new teacher?
—No, it _______ be him. He has gone to Shanghai for a meeting.
A：needn't
B：mustn't
C：can't
D：must
