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，每句中最多两处。错误涉及一个单词的增加、删除或修改。

增加：在此处加一个漏字符号(∧)，并在其下面写出修改的词。

删除：把多余的词用斜线(＼)划掉。

修改：在错的词下划一横线，并在其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（从十一处起）不计分。

The other day after work, I was walking down the street while I saw a boy riding a unicycle, one of those bicycle with only one wheel. Dressing in all pink from head to toe, he was singing a song which was sounded like a kid’s song. I thought he must be total crazy. Just then, a lady dropped 20-dollar bill on the ground, but he didn’t realize it and started to walk away. The guy in pink picked out the money and gave it back to her. After that, he rode on but soon disappeared before the lady could thank him. How a strange and good guy!.