单项选择题

What is the conversation mainly about

A．How to do well on poetry examination.
B．The effect of caffeine.
C．Some causes of heart disease.
D．Problems with the man's cafeteria.
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单项选择题
What is the possible relationship between the man and the woman in the conversation
A．Teacher and pupil.
B．Child and mother.
C．Costumer and salesman.
D．Classmates.
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