--- Who told you my address ? --- I don't remember clearly. It Li Mei. ---It Li
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--- 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
试题答案
C