A、A telephone operator. B、A real estate agent. C、A tourist guide. D、An architect. B对话中女士没有直接介绍自己的职业，但是整则对话的主题很明显，女士带男士看一套房子，并向他

W: Here we have a wonderful little three-bedroom house perfect for a young family.
M: Really? Can you give me a tour?
W: Absolutely, that’ s my job.  ( Sounds of street) Here we are. Ok. We enter into the living room. There’s also another entrance from the garage into the kitchen, but this is the main door.
M: Nice.  Where are the bathrooms?
W: Just down the hall to your left there. It’ s the first door on your right. That is back where the three bedrooms are as well. The master bedroom even has a bath of its own.
M: That’ s nice.  I’m sure my wife would like that.
W: She would.  Now if you’ ll come back out into the living room, I can show you the dining area and the kitchen. The dining area actually is part of the living room. It makes the place feel larger. Isn’t that nice?
M: Yes. And I see that the kitchen is right there in the comer of the house. Is this the door to the garage?
W: Yes. Let’ s walk out there. Here you can see the former resident also built a work area at the back of the garage. What do you think of the house?
M: It is quite to my taste. I will discuss it with my wife. We will let you know once we decide.