任意给定一篇英语短文，找出出现频率最高的3个单词，a,an,the以及标点除外。

Dear Wang Yao,
Hi!i'm jim.nice to meet you !it's very exciting to have a chinese friend.
in america ,school start at eight.so i usually get up at seven. what time does school start in china ? i have breakfest at seven-thirty.but beforethat i take a shower . my favourite subject is history, because i think it's fun and i really like my teacher ,mr hall. what is your favorite subject?
best wishes,
jim.
i出现第一，at第二，is也有。
键盘不能大写，望见谅。

这个是什么