听力原文：W: Don't you have any good news? M: No. Yesterday I had to stay after school because I was talking during my science teacher's class. W: You'd better keep quiet during class. M: Sometimes I do. The day before yesterday, I was very quiet during my history teacher's class and I still had to stay after school. W: Why? M: Because I fell asleep in his class, but it was not my fault. His class was too boring. W: I advise you to take school more seriously. If you don't pass your exam, you'll have to go out and work as a result. M: But I think working is more interesting than having boring classes every day. What did the boy often do at school?