听力原文：M: So, Rebecca, what did you do for spring break7 F: I went to southern California. I was in Los Angeles and San Diego. Oh, and I stopped in San Juan Capistrano. That’s south of Los Angeles and north of San Diego. I happened to be there just about the time the swallows re-turned. M: Oh, I’ve heard about that they always return on the same day, don't they? F: That's right, on March 19th. And they always fly away on the same day, October 23rd. In the meantime, they migrate over 7,000 miles to get to their winter homes. M: Seven thousand miles imagine! And always coming back on the same day! F: Yes, except for one year, a long time ago they were delayed for a day by a storm at sea. M: So, what's the town of San Juan Capistrano like? F: Oh, it’s a pleasant little town. Once there was a famous mission church there. M: Once? What happened to it? F: It was destroyed by an earthquake almost two hundred years ago. But there is an old adobe church that sur-vived. The swallows build their nests in the walls and towers of that church. M: You sure were lucky to be there on the one day of the year when the swallows return. F: Well, I wasn’t there exactly on that day. I got to town a couple of days later——but I did see the parade celebrating the swallows’return. M. They have a parade? The people there must really like those swallows. F: Sure——they bring lots of tourists to town, and be-sides, the swallows eat insects——including mosqui-toes ! Where is the town of San Juan Capistrano?