单项选择题
[听力原文] M: Excuse me, can you tell me the gate for the flight to Paris W: Do you have the flight number
A．At a post office. B．In a classroom. C．At an airport. D．At a bank.
A．Americans take interests in social customs B．Americans do not talk about rank, especially socially C．Americans don’t care much about social rank D．Americans feel uncomfortable when talking about rank
A．Five days. B．Ten weeks. C．Forty weeks. D．Not mentioned.