英语帝进,帮帮小弟,要交给美国寄宿家庭的信,我写了不过关,求加工,

MY dear host family：
Here I am always eagerly looking forward to attain a golden opportunity to stay with you !First and foremost ,please allow me to make a brief and sincere self-introduction to you before we meet in America.
I come from Guangzhou city ,Guangdong province of the People’s Republic of China ,which is well-known worldwide as a country with a splendid culture and centuries-old histories .My Chinese name is Zuhao Chen,and My Nick name is David.I am 162cm in height,and 53KG in weight.I am a 13-year-old boy who is always outgoing ,optimistic,diligent ,talktive and kind-hearted .Besides ,I am always ready to help others in need ,so I have a multitude of lifelong friends!
When it comes to my hobbies,I’d like to say that my hobbies are tremendously extensive.I am strikingly interested in swimming,having a picnic with my friends or my family members outdoors in those sunny days ,listening to some classical music,and playing computer games.As a boy who is really keen to learn about the outside world,I am also fond of reading,surfing online.It is through the surrounding resources available to me that I know a lot about many NBA stars,such as Kobe Bryant ,Steve Nash.And by a fairly simple clink on the websites of the Internet,I also know what is happening in the South hemisphere of the Planet Earth.Without the boredom and inconvenience to fly to England ,I can enjoy a live football match of the European Football Championship.
As a totally dominant role on the Planet,the United States are not only enjoying her leading glory ,superiority and endless governing power in all perspectives such as economy,human science ,education,and politics,etc,but also making an irreplaceable and remarkable contribution to push forward the developments of the human beings in all fields .
So ,I want to learn a lot about the U.S.A,and I also want to meet you as soon as possible.I am easy to get along with people,I think we will have a good time.
Sincerely Yours ,David.
2011-5-2

在说说你对美国的认识（夸夸美国），说说你去美国的目的，希望人家帮什么忙。。。

太短 且 意思太简略 这样不行 说些吸引人的