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。作文中共有10处错误，每句中最多有两处。错误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：在错的词下画一横线，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 Tom,

I’m glad to accept your last letter. Thanks for your concern about the heavy haze affecting normal teaching activities in our school. We have actual taken several practical measures to handle.

To begin with, attach great importance to the health of the young, our government has fixed a set of equipments to provide fresh air in our school, that can basically solve the problem. In addition to, parents donate lots of air purifiers. However, inside the buildings of our school, we did have fresh and refined air. Besides these, our school avoids outdoor activities when haze attacks.

I do believe a disturbing issue will be solved pretty soon in China.

Yours,

Li Hua