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。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）不计分。

It was about 6 o’clock in the afternoon when I was walking along the road, heading home from school. The wind blew so hard that, all of sudden, an advertising board by the roadside was blew down to the ground. Before realizing that had happened, I was knocked down by the board. I feel great pain in my legs and could not move. At that moment, a man who ran up to help me. Seen I was badly hurt, he drove me to the hospital immediate. After calling my parents, the man left without leaving my name and address. What I remember is that he is a middle-aged man. I want to finding the man and express my thank.