是写信吧。Date: xxxxxDear xxxx,How are you doing? Haven't heard from you for quite a long time, I miss you very much.I really had a very good time in the summer holidays. I have taken part in a lot of interesting activities besides going over my lessons, for example, learning to play badminton with one of best classmates Wang Ling, taking a trip to Yellow Mountain. But what made me most excited is watching the Olympic Games on TV, especially when seeing so many Chinese athelets obtaining gold medals. After the school started, I was very happy to see my classmates again. This is my last year in junior middle school, I have to study harder. I hope that I will be able to enter a key senior high school in our city. For my English study, I would like to ask you to help me to buy an English-Chinese dictionary published by xxxx, which we can't buy in our city.I also would like to invite you to visit me when you are free, and I think the National Day holidays will be a good choice. I will show you arround our city.Looking forward to your reply.Sincerely yours,xxxx