第一节
听下面5段对话。每段对话后有一道小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。
听力原文：W: Can I help you, sir？
M: Yes, I'd like to choose some flowers to send to my girlfriend.
W: Let's see. These fresh roses are very nice.
M: Yeah, you are right.
What's the relationship between the speakers？

A. They are boyfriend and girlfriend.
B. They are salesperson and customer.
C. They are friends.