题目内容：

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。

Our English teacher, Ms. Joan, came to our school in 1986. She taught English for nearly 31 years so far. She works hardly and has been a model teacher for ages.

She is kind to us but she is rather strict with us as well. She always encourages ourselves to speak and read more English. She is good at teaching and tries her best to make every lesson lively and interested. She is not only our teacher and also our friend. We students love and respect for her.

Tomorrow she is going to attend a important meeting, at which she will be given a medal for his advanced deeds. We both sincerely congratulate her on achieving so extraordinary achievements.