短文改错(共10小题；每小题l分，满分l0分)
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。
I firmly believe that everyone in the world loves his mother. So am I. My mother is an ordinary teacher. She always works hardly, just as other mothers do every day. In fact, she isn’t good health. She had been suffering from arthritis for many years. In spite of this, he never stops working or gives up hope. I still remember the day that my mother accepted a card of congratulations for Teachers’ Day from her director. The card was read “Thank you for your hard works; Happy Teachers’ Day to you!” At that moment, I was so moving that tears came to my eyes. I’m proud of my mother.