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．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

　　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．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（）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．

　　Since my childhood，libraries had played an important role in my life．When I was a pupil，I regarded on my every trip to the school library as an adventure．I enjoyed my stay at the library when I could read various book I was interested in．It was for this reason why I decided to volunteer at a library．At first I had difficulty remember where each book should be shelved，and I got used to doing so soon with the help of a kind librarian．Working in the library might seem bored for most people．However，it was rewarding experience for me．It not only developed my ability to read，but also help me make a contribution to society．