题目内容：

短文改错（共10小题；每小题1分，满分10分）

假定英语课上老师要求同桌之间交换修改作文，请你修改你同学写的以下作文。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。

As a middle school student of Senior Three．I do sports one and two hours a day, such as doing morning exercises, playing basketball, long-distance running and so on．I think it is very helpfully in me．Take exercise makes me even more healthier so that I won't be ill very often. What's more, I also get myself relaxing in different kinds of sports. Only in this way I do a better job in my study in high spirits．For doing physical exercise, I'm becoming stronger and more confident than ago．I did think it is necessary for everyone to spend some time on sports every day so people's health is important in modern life．