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，每句中最多有两赴，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（八），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限一词。
2．只允许修改10处，多者（从第11处起）不计分。
I'm writing to tell you about a heat discussion among us students in our school about why students of Senior 3 should take physical exercise.
55% of the students think that we should take physical exercise each day, such as doing morning exercises, playing table tennis and basketball, etc. It can build our body, keep me healthy and reduce illnesses. Meanwhile, it can make us complete relaxed for a better learning effect.
However, 45% of the students are against that. They complained that taking physical exercise is waste of time. It can make us tired or feel too excited for further learning. More over, we may get hurt during the play. I personally think that proper physical exercise is necessary and never too hard.