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。每处错误仅涉及一个单词的增加、删除或修改。

增加：在此处加一个漏字符号(Λ)，并在其下面写出增加的词。

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。

Of all my teachers, Mr. Smith is the one who impresses me most. Because he is 54, he looks very young at his age. And he’s one of the most popular teachers in our school. Compared with other teacher, Mr. Smith pays more attention to his way of teaching. He tries various ways to make his class lively and interestingly. In his opinion, we would not only know “what’’, but also understand “why”. So, instead of giving us answers immediately, he encourages us to think by themselves whenever he puts forward questions. With his help, we learned how to analyze and settle down problems. What a wonderful world of “what” he leads us to! He is such a learning person that we all admire him very much.