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。

Last month, my good friend Mark got an expensive watch as his birthday present. He showed to everyone in my class proud. I really envied him and every day I ask my mum to buy me an expensive present. However, to my disappointment, I only got a second-hand bike at that special day. So one day while I was riding my “dear” bike back home from school, I passed the shop that my mum worked. I saw a familiar figure kneeling down in the front of it cleaned the outside steps of the shop. It was my mum! She worked so harder to raise me! Tear in my eyes, I got off the bike and worked together with her.