单项选择题

Conversation 1
[听力原文]6-7
M: A nice day, isn’t it
W: Yes, it is.
M: Uuh... you look familiar to me. I wonder if I have seen you somewhere before.
W: Have you
M: What department do you study in
W: The Applied English Department.
M: Oh I’m in the Mechanics Department, my name is Li Feng. And you
W: I am Ling Ling.
M: Ling Ling Oh! I remember now, you sang a song in the student’s party last Saturday.
W: Yes, that’s "take me to your heart".
M: A nice song.
W: I’m going to the library. I want to borrow some English books,
M: I want to borrow some books, too.
W: Let’s go together.
M: OK, let’s go.

What’s the relationship between the two persons（）

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