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 David,

How time flies! It has been a totally week since you left our school but it seems a year. You can’t imagine what I miss the time we spent learn together! The time is so short but impressive. I am very happy to have made friends with you. I am very grateful to your help with my English and I have made great progresses in my English. I am sure it will be beneficial to your future study.

Although we have departed, but our friendship will last forever. I do hope we can keep touch as we used to. And I will try my best to continuing this precious friendship.

Yours,

Li Hua