翻译大神或在美同胞能否帮我翻译一段话，由于绿卡晚于半年登陆，所以给美国入境官看的，希望严谨，感谢。

Question

尊敬的先生你好：我在中国的大学延长了一年学制，故从2013年6月至今仍在学校读书，由于课程问题，我无法准时的登陆美国，一旦我学业结束，我将保持在美居住的时间以及登陆次数，我是真心想留在美国生活，这次的延误恳请谅解，非常感谢。

附：我在中国沈阳师范大学延长学制的证明及盖章。

Answer 1

Dear Sir,
Thanks for your time on my letter. As I extended my studies by one year, I'm still at the university, going back to June 2013. Required by the academic courses in China, I have been prevented from going to America on time. However, as soon as I'm graduated here, I'll start back for America and stay there for as long as I must. Please do try to understand me for that reason. I love the American way of life. I really do. Thanks again.
ENCLOSED, please find the certificate and the stamp for Study Extension from Shen'yang Normal University.

---------BY the way, 你都快成为美国人了，英语怎么还没有过关？