在空白处填入适当的句子，使对话完整。

A: ?

B: I think it is China. I really hope to visit it one day.

A: ?

B: It's hard to explain why China is my dream place. Maybe it's so different from our country.

A: I see. Will you travel to Beijing? ?

B: Sure! I can't really go there without seeing the Great Wall.

A: That's true. ?

B: I think the best time to visit Beijing may be in autumn.

A: ?

B: No, I don't like being part of a tour group. I'll go there by myself.