根据对话内容，从方框中选出恰当的句子补全对话。

A. How long does it take to go there by bus? B. Have fun visiting Xi'an! C. we'll go on a visit to Xi'an. D. What are you going to do there? E. How will you get there?

A: What's your class going to do for your spring field trip?

B:

A: Xi'an?

B: We're going to see the Terracotta Warriors.

A:

B: We'll go there by bus.

A:

B: About ten hours. It takes a little long, but it's cheap.

A:

B: Thanks.