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：在错的词下面划一横线，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．

To increase the aware of protecting the environment， last Saturday we， some volunteers， carried out environmental protection activity in the Civil Square．

In the morning， we have gathered at the school gate at 7：00． Then we walked to the square， when we were divided into several groups． Some collected the rubbishes on the square， some cleared the old posters off the walls， and another swept the ground． The duty of my group is to deliver environmental protection brochures and introduces the importance of environmental protection．

Time passed quickly． It was getting late after we knew it and the square looked more beautifully． Tiring as I was， I was very happy because we did do something to protect the environment．