听力原文：W: What a terrific drawing, Mark! I didn't know you could paint.
M: Well. I'm just learning. It's one piece of work for my oil painting class.
W: It's pretty good for a beginner. I think your teacher will definitely give this painting a full mark.
M: I hope so. (23) But you see, last time I had a dispute with my definitely give this painting a full mark. work at all.
M: Look here in the picture. My teacher insisted that it just needed to fill in with other colors of painting. But I think the sky should be blue.
W: Well. it depends Sometimes it is blue and sometimes it isn't, as sunset can be full reds and purples.
W: (24)How about light brown color？
M: Oh, yeah. Added some light brown to the sky, it will turn out to be full reds and purples. great! You must have taken many painting courses before.
W: Well, (25) I haven't accepted any painting training before. But I'd love to visit art museums. Each time I go abroad, the art center of the destination country is a quite necessary place for my visiting.
M: Wow, then what kind of painting do you like most？ Oil painting？
W: Frankly speaking, I prefer using water colors. I don't like the smell of oil paints.
(20)

A. The teacher appreciated his painting very much.
B. The teacher advise Mark to change the color.
C. They had a dispute about the choice of color.
D. Mark was severely scolded by the teacher.