问题补充：
A: Listen! Is it Linda singing in the next room?
B: No, it be her. She is still in Shanghai.
A. can’t
B. couldn’t
C. may not
D. might not
答案：
(答案→)A. can’t
B. couldn’t
C. may not
D. might not
解析：本题考查的是情态动词表示推测，根据后文“She is still in Shanghai.”说明她不可能在家，故选A
