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。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(＼)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。
My favorite teacher is my geography teacher，that is an old gentleman. He is tall but thin, and wears a glasses. He enjoys teaching and loving his students. He comes to school very early in the morning and sometimes stays longer after school has finished. He seems to know anything about geography and is always telling us interested facts. He talks a very slow but humorous tone and nobody falls sleeping in his class. He is very kind and nice but is also strict so we have to make sure we work hardly!