听力原文:M: I have been tired of working and need a change. So I'm just making plans to go away during Spring Festival. W: Really? Where are you going? M: I'm planning to visit Tibet. W: My brother and I had a vacation there last year and we had a great time. M: Did you get into Lasa? W: Sure. That's the first stop. No one would miss Lasa. M: Is the Potala Palace magnificent? W: You bet. And don't forget the Barkhor Street. That place is full of treasures, I mean, all the exotic paintings and handicrafts, and the hand-made jewelries. M: Well, as them is so much there waiting for mc, I guess I should stay longer. W: Definitely. M: I heard that the weather there is great. W: Well, that depends on how you define 'great'. No humidity, but it could be extremely cold in winter. Besides, you do need to be careful about high altitude. M: What should I do about that? W: Oh, just take it easy for a few days. Don't exercise too vigorously. Just do everything gradually. M: I'm sure I will be fine. And I will let you know all about my trip when I come back. (23)