A. At an airport.B. In the hotel.C. At a bus stop.D. In a subway station.

【答案】A

【解析】

M: How much should I pay for the overweight?

W: The charge for extra baggage is calculated by 1.5% of the standard ticket fare for economy class.

Q: Where does the conversation most probably take place?

此题为听力题，解析略。