听力原文:M: Welcome to Philadelphia, Julia. W: Thank you. M: Is everything settled? W: Almost. M: What can I do for you? W: I suppose I should look for a bigger house. But I don't see how I can afford one right now. M: If only you hadn't spent so much money on your vacation this summer! W: You're right. But I really had a happy vacation. M: OK. Maybe you can move into my mother's house and share that with her for a couple of months. W: Thank you. But I don't want to trouble you too much. M: No trouble at all. W: How much should I pay for the rent? M: About $400 a month. W: Great. That's one-third less than it was when I first rented a house. Why doesn't the woman have enough money at hand to rent a bigger house?