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245. 听下面材料，回答第(1) (2) (3) 题。
(1) What's the probable relationship between the two speakers?
A. Husband and wife.
B. Teacher and student.
C. Mother and son.
(2) What does the man do?
A. He is a writer.
B. He is a student.
C. He is a chemist.
(3) What will they probably do soon?
A. Set up a lab.
B. Write papers.
C. Work on experiments.
