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）每处错误及其修改仅限一词；
2）只允许修改10处，多者（从第11处起）不记分。
    My experience at the begin of my high school life has taught me a good lesson. During that period, it never occurred to me that I was going to be or what kind of life I'd like to live. I always waste my time chatting online and play computer games. It was my poor grades in the mid-term exams and my head teacher's inspiration that made me realized the importance of set a goal. From then on, I made my mind to get admitted into a famous university and devote me to some research work. Guided by my dream, I found myself making a great progress.
    As a famous man once said, “ Living without an aim is like sailing without compass”. Only if we have certain goals in mind and stick on them can we make a difference and achieve success.