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。作文中共有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：在错的词下画一横线，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1l处起)不计分。
I’m very grateful to my English teacher．In the past，my biggest shortcoming used to being carelessness，that worried me a lot．To make matters worse，I was so anxious to seek the fundamental reason in my failure．I just devoted me to huge amounts of practice，not paying attention to repeated mistakes．Fortunately，my teacher noticed it and offers to have a long talk with me．She gave me lots of advices on how to get rid of it．After I was persuading to change my attitude，I finally got the right way to rid myself of carelessness and gained confidence as well as.It was the support she had given me made me what I’m today·