问题
Who told you my address ? — I don’t remember clearly. It _____ Li Mei. —It _____ Li Mei. She doesn’t know it.
A:can be; mustn’t be
B:may have been;must have been
C:may have been; can’t be
D:must have been ; can’t have been
B:may have been;must have been
C:may have been; can’t be
D:must have been ; can’t have been
正确答案是：
