—Listen Is Miss Smith giving a speech in the class

题目

—Listen Is Miss Smith giving a speech in the class
—No,it _____ be her .She has gone to Hong Kong .
A may not B mustn't C can't D needn't
讨论的结果是选B还是选C有争议,

答案

C
我们老师讲过,mustn't是不允许,can't 是不会；不能
我敢肯定是C !