你是吴刚，是个交流学生(an exchange student), 四年前住在美国Johnson 家。现在你已经回国。根据以下要点，用英语写一篇100词左右的感谢信。开头和结尾已给出，不计入总词数。
Dear Mr and Mrs Johnson，
I am Wu Gang.I have been backhome inChina.Iam too eager to write a letter to you and your family the moment my feet hitthe land of China. In the past four years，you have treated me like yourown child，caring about my study and life. Whenever I was in trouble，you were always giving me ahand.Whenever I made progress，you were always sharing with me my joy.I am so grateful.Thank youvery much.
Over the four years，I have been well aware of thedifferences of family education between the two countries.For example，in China，our parents tend to doeverything for their children.In the USA，children are encouraged to develop working attitude andindependenceliving ability.
Now I am making every effort to apply for ajob.Welcome to China.If you come，I can act as a guide and you will enjoy yourselves.
I’m Li Hua, one of your students inChina. It’s almost a month since you left us. We all miss you and are verygrateful for what you did for us.
We are busy as usual. We had an Englishspeech contest the other day. I won the first prize! This again reminds me ofall your kind help. Do you still remember the trees we planted together on thehill behind the school? Yesterday, we went there and watered them. The tree youplanted yourself is growing well, and the whole class decided to name it SueWood. Will you come back to see Sue Wood?
How is everything with you lately? Wehope to know more about you and your American students. Hope to keep in closetouch.
All the best.
Thank you so much for …
I warmly appreciate your hospitality(款待).
I am writing to express my thanks for …
I am writing to extend my sincere/hearty gratitude/appreciation(真诚的感谢)for …
I would like to convey in this letter my heartfelt thanks to you for …
Thank you very much for the gift you sent me. It’s one of the most wonderful gifts I got on my birthday.
I am writing this letter to thank you for your warm hospitality accorded to me and my delegation during our recent visit to your beautiful country. I would also like to thank you for your interesting discussion with me which I have found very informative and useful.
Again, I would like to express my warm thanks to you! Please accept my gratitude.
Thanks again and I hope that I will have the opportunity to return/ repay your kindness.
I am looking forward to…