补全对话。根据对话内容，从下边方框中选出适当的选项补全对话。

A. What does he look like? B. Who is your best friend? C. Why is she your best friend? D. We both like singing and drawing.

 
A: Do you know Susan, Linda?
B: Yes, she is my best friend.
A:     
B: Because she likes to do the same things as I do.   
A: Do you always sing and draw together?
B: Yes. But I’m more hard-working than Susan. What about you, Mike?    
A: My best friend is Dave.
B:     
A: He is tall and has short hair.