单项选择题


听下面5段对话或独白。每段对话或独白后有几个小题,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。听每段对话或独白前,你将有5秒钟的时间阅读各个小题;听完后,各小题将给出5秒钟的作答时间。每段对话或独白读两遍。
What is most probably their relationship

A. They are friends.
B. They are classmates.
C. They used to be colleagues.