根据对话内容，排列下列句子成一段通顺的对话。

(  5 ) A. I hope so, but I don't think so.

( ) B. Do you think everyone will speak the same language in the future?

(  1 ) C. Maybe there will be more people. There may not be enough food.

(     ) D. Maybe people will be able to live in space stations on the moon.

(     ) E. I hope not.

(     ) F. I don't think so. Maybe people will be able to live on the moon.

(     ) G. I hope so. Then people in different countries will be able to understand each other better.

(  3 ) H. Maybe there won't be enough room for everybody on earth, either. Maybe people will have 

              no place to live.

(     ) I. Maybe they will be able to grow vegetables there.