题干
--- Is that man Mr. Smith?
--- It ______ be him. He has gone to NewYork on business.
A：may not
B：needn't
C：can't
D：mustn't
答案(点此获取答案解析）
C
--- Is that man Mr. Smith?
--- It ______ be him. He has gone to NewYork on business.
A：may not
B：needn't
C：can't
D：mustn't
