A、At an exhibition. B、At the office. C、At a fashion show. D、At a gallery. A从信息词exhibition halls，the Fair可知答案。

W: Look, so many people are crowding through the gates into the exhibition halls.
M: But last year they had fewer visitors to the Fair. This year they have more visitors since the economy is booming.
W: You can’t call them visitors. They are businessmen from all over the world.
M: I know. The World Fair plays a very important role in the international trade. Look, what an array of products!
W: Here’s a pamphlet. It says there are 80 kinds of products, 100 if the trial products included.
M: That’s impressive.
W: What are you interested in?
M: The handicrafts and office equipment. What about you?
W: I have no interest in that. I’d like to see the fashion. I’m in the textile business.
M: Well, here’s something special. The tag on the material says it is still experimental.
W: Mm ... It’s very attractive.
M: It looks like leather. Is it made of leather or paper?
W: It is made of paper. It’s treated with a special coating.
M: It’s very realistic. I think there would be a lot of application.
W: I’d like to talk to the company that makes them. I want to place an order with it if the price is right.
M: Let’s go to the conference room. It’s on the third floor. We can take the lift.
W: But the sign says the lift is broken. We have to walk upstairs.