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语言错误，每句中最多有两处。没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（∧),并在其下写出该加的词。

删除：吧多余的词用斜线（\）划掉。

修改：在错的词下面画一横线，并在该词下面写出修改后的词。

注意：1.没处错误及其修改仅限一词；

2.只允许修改10处，多者（从第11处起）不计分。

Of all my teachers, Mr Mike is the one who impress me most. Though he is 35, but he looks very young for his age. And he's one of the most popular teacher in our school.

Comparing with other teachers, Mr Mike pays much attention to his way of teaching. He tries various ways to make his class lively and interested. In his opinion, we should not only know “what”, but also understand “why”. So, instead of giving us answers immediate, he encourages us to think by myself whenever he puts forward questions. Without his help, we've learned how to analyze and settle problems. What wonderful world of “ why” he leads us to !

He is such a learned person that we all admire him very much.

先天性心脏病仅出现下半身发绀、杵状指时，首先应考虑（）

A.室间隔缺损

B.房间隔缺损

C.动脉导管未闭

D.法洛四联症

E.艾森门格综合征