听力原文：M: Mary, I hope you are packed and ready to leave.
W: Yes, I'm packed, but not quite ready. I can't find my passport.
M: Your passport？ That's the one thing you mustn't leave behind!
W: I know. I haven't lost it. I've packed it, but I can't remember which bag it's in.
M: Well, you'll have to find it at the airport. Come on! The taxi is waiting.
W: Did you say taxi？ I thought we were going in your car.
M: Yes, well, I had planned to, but I'll explain later. You've got to be there in an hour.
W: The plane doesn't leave for two hours. Anyway, I'm ready to go now.
M: Now, you are taking just one case, is that right？
W: No, there is one in the hall as well.
M: Gosh, what a lot of stuff] You are taking enough for a month instead of a week.
W: Well, you can't depend on the weather. It might be cold.
M: It's never cold in Rome. Certainly not in May. Come on, we really must go.
W: Right, we are ready. We've got the bags, I'm sure there is no need to rash.
M: There is. I asked the taxi driver to wait two minutes, not twenty!
W: Look, I'm supposed to be going away to relax. You are making me nervous!
M: Well, I want you to relax on holidays, but you can't relax yet.
W: OK, I promise not to relax, at least not until we get to the airport and I find my passport.
(23)

A. She has packed it in one of her bags.
B. She is going to get it at the airport.
C. She has probably left it in a taxi.
D. She is afraid that she has lost it.