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(＼)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11处起）不计分。
Mr. Li is my head teacher. He is now in his thirty and has been teaching in almost ten years. He has much knowledges and his teaching method is scientific. All of us enjoy his lessons which are lively and interested. Not only is he strict and also he is kind and patient. As a result, he is popular with our students. All these years he has devoted to teaching his students. In addition, he often gave his encouragement to us, that means a lot to us. With his help, we have made a great progress. We all love him!
