（2015.天津）--- Is that man Mr. Smith? --- It ______ be him. He has gone to NewYork on business.

题型：单选题题类：真题难易度：普通

— 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

举一反三

— But it ______ be him, because he has made so many mistakes.

— No, you _______. You ________ do your homework first.

—No, you ______. You can do your homework first.

—Yes, surely you___.

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