假设你叫王宁，是甘肃的一名普通高中生。你很喜欢学习英语，但是你对英式英语和美式英语的区别不是很清楚。有些同学说你说美式英语，但又有些人认为你说的是英式英语。你很想知道自己说的是那种英语，以及这两者究竟有什么不同。些一封信给史密斯先生，请他回信解释这两者的主要区别。
Dear Mr Smith,
My name is Wang Ning. I an a high school student in GanSu Province....

Dear Mr Smith,
My name is Wang Ning. I an a high school student in GanSu Province,I have a question to ask you.
Some of my classmates prefer British English ,so that they suggested me to speak British English.However,another part of my fellows enjoy speaking American English,in terms of this,I was advised speaking American English.
In my mind,I am not quite sure about what the differences between American English and British English and I find there's no way to tell them apart.Actually,I want to ask that how to tell the uncommon parts of the two kinds of English and which I should choose.
That's what I what to ask.
Looking forward to your return letter.
yours,Wangning