听力原文：M: How long can I keep the book？W: Three weeks but you can renew it if you need
听力,原文
已帮助 人
听力原文：M: How long can I keep the book？
W: Three weeks, but you can renew it if you need it for a longer time.
Q: What is the possible relationship between the speakers？
(13)
A．Professor and student.
B．Shop assistant and customer.
C．Librarian and reader.
D．Two friends.