A、Father and daughter, B、Teacher and student. C、Doctor and patient. D、Boss and secretary. C此对话涉及对话双方的关系，也是要求关注听力中对话主题这一种类型的题目，根据

W: Whereas European nations have traditionally employed metric units such as meters and grams, the U.S. has employed English units such as feet and pounds.
M: Both systems are now in use in the U.S., though.
Q: What are the two people talking about?

W: I think I am running a temperature, and I feel sick.
M: OK. Let’s have a check-up. Come into the examination room, please.
Q: What is the probable relationship between the two speakers?