—Listen!It

问题详情：

— Listen! It _______ be Jenny playing the piano in the music hall. — It _______ be her. Because I saw her go home a moment ago. 

       A. may, mustn’t  B. must, can’t   C. can, can’t  D. mustn’t, can

【回答】

B

知识点：情态动词

题型：选择题