单项选择题


第一节
说明:每段对话后有一个小题,请从题中所给的A、B、C三个选项中选出最佳选项。(每段对话后有15秒种的停顿,以便回答问题和阅读下一问题。)
Who is the man possibly talking to

A. A doctor.
B. A teacher.
C. His mother.