Hello Kelly,
Last week, I had a great time in the activity and learned a lot from it. I made some new friends there and knew more about your culture. I also want to thank you for letting me stay at your house. I had a great time staying with you. You are my best friends. I will never forget the days. The English dictionary you gave me is really helpful to me. I will keep it and use it to learn English. Hope we can have fun together next time.
Yours sincerely,
Lihua