听力原文：W: Show me your licence please? M: What is the matter? Did I do something wrong? W: You were speeding. M: I was speeding? W: You certainly were. Do you have any idea how fast you were going? M: I'm not sure, but I was going about 35. W: This street is in a 25-mile-per-hour speed zone, you know. M: It is? W: In this state, the speed limit in residential area is 25 unless otherwise posted. Besides, there are signs all along the streets. M: I'm sorry. I guess I didn't notice. I was thinking about my mother. She is in hospital. I'm on my way there right now and I haven't planned to come this way. W: What do you mean? M: Well, I was driving along Lincoln Street but the traffic there was really bad. There was some kind of construction going on. I turned on to a side street and ended up here. Give me a break. I'm nervous enough as it is. W: Well, since you have to look after your mother. I'll give you a warning this time. But keep your eye on the speedometer from now on, whether you're on a street you are familiar with or not. (27)