-Look at the man in the classroom!Is he Mr.White? -No,it___be him.He's eating in the dining hall.

问题描述:

-Look at the man in the classroom!Is he Mr.White? -No,it___be him.He's eating in the dining hall.
A can't 正确答案是选A但是C也是表推测啊,为什么不选C 求详解
B mustn't
C may not
D needn't

因为A表示:肯定不是.语气坚定.
C表示:也许不是.语气太弱.
He's eating in the dining hall.表明,眼前这个男人肯定不是怀特先生.所以选A