ANow,you are to board the plane.We're sorry that we haven't done much to help you when you stayed in China.

现在你要登机了。很抱歉，你在中国的时候我们对你的帮助很不够。

BI appreciate what you have done for me.Everything I have seen here has left a deep impression on me. I really don't know how to express my thanks to you.

十分感谢你对我的关照。在中国见到的一切给我留下了深刻的印象。我真不知道怎样感谢你们。