根据对话内容，从下面方框中选择适当的句子补全对话。

A. Thank you very much. B. It's the biggest one in our province. C.1've just arrived at the train station. D. Then I can go back to America by air! E. More than 2, 000 students have returned to school.

A: Welcome to our city, Mr Brown.

B: Oh, I'm sorry I have kept you waiting for a long time.

A: No.

B: It has been ten years since I came here Last time. How great the changes are!

A: We have had our own airport now. The waiting hall can hold 5, 000 people.

B:

A: You're right. This way, please.

B: I hear you have opened up 3 new Hope Middle School. Is that true?

A: Yes.

B: That's great!