题目内容：

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。

Last summer, I had a valuable experience working like a volunteer in the community hospital. I worked from July 15 to July 31, when elderly over 55 were given freely medical examinations. Every day I arrive early and organized the people who came over. Then I would help him fill in the forms. Lead them to the different departments was also one of my duty. Everyone there worked in a tight schedule. By the time their examinations were over, I was already bathing in sweat. Tired though I was, but I benefited a lot from the experience as I built up my confident and improved my communication skills.