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。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. 每处错误和修改均仅限一词；
2. 只允许修改10处，多者（从第11处起）不计分。
Steve was ten years old. He was a very good pupil, nor did he like doing his homework. When he did his homework, he always made a lot of mistake.
One day, his maths teacher went over Steve’s homework, see all his answers were right. He was very surprised instead being pleased. He asked Steve to explain what has happened, “ You have got all your answers correctly this time, Steve. Did anyone help you?”
As the matter of fact, Steve’s mother often helped him with her lessons. And that evening, she was not able to because she wasn’t in. So Steve answered, “ No, sir, my mother was busy last night, so I had to do the homework all for myself.”