题目内容：

短文改错

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。

As is known to us all, only before experiencing pains and failures in life can we really grow up good and mature physically and mentally. Once I was among the top student in my class, but later I suffered from serious disease, which almost cost my life. Luckily, I was survived. But I fell behind your fellow classmates due to missing too much lessons. But I was in despair. Then in came my head teacher, who encouraged me to study hard, convinced me that a rainbow only came after rain. And now with great efforts I have made progress.