A、Husband and wife. B、Doctor and patient. C、Teacher and student. D、Lawyer and client. B根据选项，推知提问与对话双方的身份有关，根据对话可以判断比较合适的身份应该是医生和

W: Hello, Mr. Johnson! I am calling about the car you advertised. Can you tell me something about it? M: It’s my wife’s car and she’s the one who put the ad in the paper. But I’ll try. She isn’t here right now.
Q: What is the man trying to do?

M: What’s the trouble, Mrs. Jack?
W: I’ve been very dizzy lately, and last night I had some chest pain.
Q: What is the probable relationship between the two speakers?