听力原文：W: David, who are the street people？ How did they get to living in the street？M:

听力原文：W: Tony, who are the street people？ How did they get to be living in the street？M

听力原文：W: What do you think of the book？M: Not very interesting.Q: What are they talking

听力原文：M: May I watch what you are doing？W: Sure. You make a hole, put in the seed, cove

听力原文：M: There are some interesting shells on the beach today.W: What if we collect som

听力原文：W: Are you going to buy a house in the suburbs？M: No, I prefer to live in the cit

听力原文：M: How are you doing with your plan？W: No one knows how to do the work correctly,