A、The teacher appreciated his painting very much. B、The teacher advised Mark to change the topic. C、They had a dispute about his

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. But you see, last time I had a dispute with my teacher. It seems that he didn’t appreciate my work at all.
W: Why?
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.
M: It sounds reasonable. Then what kind of color should I add to it?
W: How about light brown color?
M: Oh, yeah. Add some light brown to the sky, it will turn out to be more natural than before. You’re so great! You must have taken many painting courses before.
W: Well, 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 the oil paints. 13. What happened between Mark and his painting teacher?
14. What does the woman suggest the man do with the painting?
15. How did the woman learn about painting?