非常遗憾的提醒你：被拒4次则几乎没有可能再签过美国了。他们留了案底，一般2签被拒就很难再过了，我有一同学，一口气签了六次，均没过，与美国大学无缘，则及时该道到了加拿大读大学。但又怕影响加拿大签证，就又换了新护照，结果现在加拿大3年了。
祝你好运！

假如你是李华，你听说你们班的美国外教sam英国留学过，写一封邀请信请他到你们班给你讲美英英语区别

Dear Professor Sam,
I am one of the classmates of class two. Our classmates want to know the differences between Britain English and American English. I have heard that you have studied in Britain. I would like to invite you to come to our class and tell us something about it? We really appriciate it if you can come.
Yours,
Lihua