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：在缺词处加一个漏词符号（^），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。

Three days before, my aunt went to attend a meeting. After the meeting, she went to a restaurant for a lunch. Therefore, when it was time to pay the bill, she couldn’t find her purse. She thought it must have stolen. Just then, a man in his early twenty came up and paid for her. My aunt was very gratefully. They talked about each other for a while and my aunt finally realize who he was. My aunt had collected some money to helping a boy before. That young man was the boy. My aunt didn’t recognize her, but the kindness had never been forgotten.