根据对话内容选择适当的选项完成对话。
A: Do you know the man in the picture?
B: 1._____Oh, he's Li Yong.
A: 2._____
B: He's tall and he has long curly hair.
A: 3._____
B: Yes, he does. He is very friendly.
A: 4._____
B: Yes, l do. He's very cute and his show is very interesting.
A: I like him, too.
B: Do you think he is a famous host?
A: 5._____
A. Yes, I do.
B. What does he look like?
C. Does he often wear a black suit?
D. Do you like him?
E. Let me have a look.
，则k等于（）。
，又k≠0，则k=-1。