--- 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
网友回答
A. can be; mustn’t be
B. may have been;must have been
(答案→)C. may have been; can’t be
D. must have been ; can’t have been
解析：本题考查情态动词。句中may也许，可能之一，为不肯定的推测；can’t不可能。句意：——谁告诉你我的地址的？——我记不清了，也许是李梅。——不可能是李梅，她不知道。