题目内容：

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号()，并在其下面写出该加的词。

删除：把多余的词用斜线(＼)划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1. 每处错误及其修改均仅限一词；

2. 只允许修改10处，多者（从第11处起）不计分。

Dear Sir,

Thank you for invite me to the summer English course in your school. As for your choice between the two courses, I prefer a four-week course because it will give me more time to do some traveling and make a few new friends. Of all the subject I’m learning at school, I like English best. I had learned English for 6 years but my spoken English remains poorly. So I hope to take this chance improve it. If possible, I’d like to stay with a family in a few days in order that I can learn about any customs in England, which I’m particularly interested in. I believe I will have a wonderful time in this summer.

Yours truly,

Li Hua