13. A) Taking a picture of Prof. Brown.
B) Commenting on an oil-painting.
C) Hosting a TV program.
D) Staging a performance.
答案：
13. C) Hosting a TV program.
原文：
13. W: Well, tonight we have Professor Brown in our studio to talk about the famous oil painting of Queen Victoria. Good evening, professor.
M: Good evening, madam, my pleasure to be here tonight.
Q: What is the woman doing?