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。
Of all my teachers, Mr. Black is the one impresses me most. He is 34, so he looks young for his age. And he's one of the most popular teachers in our school. Mr. Black always pay more attention to his way of teaching, comparing with other teachers. He tries different ways to make his classes actively and lively. In his opinion, we should not only know "what", but also understand "why". So, instead of giving us answer immediately, he encourages us to think by ourselves every time when he puts forward questions. Under his help, we've learned how to solve problems. He leads us to so wonderful world of "why" that we all admire and respect her.
