问题
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;
B:must, can’t
C:can, can’t
D:mustn’t, can;
正确答案是：
