A、At a conference hall. B、At an art gallery. C、At an airport. D、At a hotel. D文中虽然听到了“art gallery”；“airport”；“conference”；但针对问题，都

M: You’ll be in Room 207. Here’s your key, and I hope you enjoy your stay with us, Ms. Cook.
W: Thanks. Oh, by the way, I’d like to get some information  from you. You see, the conference I’m attending will be over early Wednesday, and I don’t fly out until Thursday. Do you have any recommendations for sight - seeing?
M: There’s a great planetarium at our natural history museum.— You might enjoy that.
W: I don’t know — I don’t think I went to do that. The city I come from has a good planetarium.
M: There are also some good art galleries downtown.
W: I’m more interested in doing something outdoors.
M: Oh, well, there’s a beautiful waterfall called Crystal Fails not far from here.
W: That sounds like something I’d enjoy seeing. How do I get there?
M: Do you have a car, or will you be taking a bus?
W: I rented a car at the airport.
M: Then just take Waterson Street west out of town and go about five miles. You’ll see a sign that says Crystal Falls. It’s a short walk from there.
W: That sounds great. Thanks!