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．

One rainy day while I was walking home with one of my friend, a truck came to a stop besides us. The driver put the window down and offered us a umbrella because he found we were wet through. I stood there and couldn’t believe in that a complete stranger is so thoughtful. The man insisted, so I grateful accepted the offer, thanked him and watched the truck disappear down the road. This man might need the umbrella himself, and he preferred to give them to someone else. It was a lesson to us that it was possible give without expect anything in return.