不管了，先給妳壹份正式用語的。望采納！
Dear Pricipal of Xinhua Primary School and School Management Team(這裏指的是學校管理團隊,其中包括了外聯部，看妳的個人喜好啦）
My name is Hua Li and i would like to recommand myself to be the student assitant.
I am a very warm hearted guy who spent 5 years in the U.S learning english. I also love to meet and help other people, and I always open my up to them so they dont't feel like they are on their own.
And the most important thing is I can talk and write just like any English kids who's mother language is English! I think that i can totally win this job and make our school better!
Thank you!
我寫了壹個超簡單的，妳如果還有需要再追問我。采納壹下吧！我才壹級啊！可憐可憐我吧！！