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

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。

删除：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。

The other day after work, I was walking down the street while I saw a boy riding a nice 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!

1.第一行：while改为when：was/were doing sth when … 是固定搭配；
2第二行：bicycle改为bicycles，those后应当用复数；

3.dressing 改为dressed，dress是及物动词，与主语是被动关系，故用过去分词形式；
4第三行：去掉sounded前的was，sound是不及物动词，不能用被动语态；

5.total改为totally，用副词修饰形容词；
6.第四行：dropped后加a，一张20美元的钞票；bill是可数名词；

7.he改为she，此处应当指代的是a lady；
8。第五行：out改为up，pick up是固定短语，捡起；

9.but改为and，上下句是并列关系；
10.How改为what，固定句型：what a/an adj+可数名词单数=How adj a/an 可数名词单数。