听力原文：W: Hi, Mark. I didn't know you could paint. M: Well, I'm just learning. It's for my studio art class. W: Ifs pretty good for a beginner. M: Oh thanks, Judy. The instructor really liked my schedules, but she hasn't seen my painting yet. W: En, there seems to be something wrong with it though. M: Yeah, I know what you mean. It doesn't look right to me either. W: I think I know. Look here at the sky, it just seems to fill in with other colors of painting. M: What do you mean? Everyone knows the sky is blue. W: Well, that depends. Sometime it is and sometime it isn't, as sunset can be full of reds and purples. Well, even now, take a look now Mark, what do you see? M: It looks blue to me. W: Look again. Do you see a kind of tannish color? M: Oh yeah, I see what you mean. W: By adding some tan to your sky, I think you'll get a more accurate picture, and the color will look more natural. M: I think I'll try that. Gee, how did you get to know so much about painting? Have you taken a lot of courses? W: No, actually. But my father is an artist. M: A professional artist? W: Oh yeah. M: I wish we could talk some more, Judy. How about going for a cup of coffee? I'm ready for a break. W: I'd love to. But I have to take a history exam. In fact, I was just on my way to the classroom, and I think I am already late. Maybe tomorrow. M: Great, I'll meet you at the students' center after my class. A little after three, ok? W: Sounds good. Got to be going now. M: Bye, Judy. (23)