答案：
Dear Peter,
It is a pleasure for me to write this letter to tell you how much I enjoyed my stay with your family during the exchange activity organized by our school. This was my first visit to England and stay with an English family. At first I was worried about my poor English. But when I saw your wife and children waiting for me with warm smiles of welcome on their faces, I immediately felt relaxed. There are many happy memories of that time that I will keep with me forever. I particularly enjoyed driving through the countryside with you and seeing the changing colours of he leaves on the trees. I also liked the fishing trip, which was so much fun.
Please give my best regards to your wife and children.
Yours,
Li Hua