–Lookatthatgirl!IsitSusan?    --No,it_______beher.Sheha...

问题详情：

–Look at that girl! Is it Susan?

     --No, it _______ be her. She has gone back to her hometown.

   A. mustn’t         B. can’t        C. needn’t         D. wouldn’t

【回答】

B

知识点：情态动词

题型：选择题