根据对话内容，从下面方框中选出恰当的句子补全对话，有一个选项是多余的。                                 

A. Where have you been? B. Congratulations(祝贺)! You're always the best. C. I went to Beijing last week. D. I took part in the Chinese Ancient Poem Reading Competition there. E. And what do you think of the competition? F. I agree with you. It's our duty to keep and spread our traditional cultures.

A: Hi, Zhang Ming. I haven't seen you for a long time. Did you go travelling?

B: No, I had no time to travel. 

A: What did you do there?

B: 

A: Sounds exciting! How did you perform(表 现)？

B: I won the first prize.

A: 

B: Thank you.

A: Whose poems(诗)did you choose?

B: I chose Du Fu's.

A: 

B: It's fantastic. You know, our Chinese ancient poems are really great. We can learn much from them.

A: 

B: That's right.