补全对话。根据下面的对话内容，从方框内的选项(A、B、C、D、E、或F)中选出最佳选项。选项中有一个为多余选项。

A. It has been over 2,400 years. B. What did you do these days? C. There is no class in the afternoon. D. Do you know the history of the kite? E. It was for the needs of war by passing information. F. How many kites do you have at home?

 
A: Hi, Mary! How are you?
B: Hello, Tom! I flew a kite with my friends.
A: Really? Sounds great! 
B: Yes. The kite was one of the first things in China and it was used for missing the death of the families and friends.
A: That’s right! The earliest kite was made of wood by Mo Di from China.
B: How long its history is!
A: Yes. And the first kite was not for entertainment.
B: That’s interesting!Let’ s fly a kite.
A: That’s great!
B: Let’s go!