听一段材料，回答下面几个小题。What's the probable relationship between the two speakers?
A. Husband and wife.
B. Teacher and student.
C. Mother and son.What does the man do?
A. He is a writer.
B. He is a student.
C. He is a chemist.What will they probably do soon?
A. Set up a lab.
B. Write papers.
C. Work on experiments.
