假如英语课上老师要求同学们交换修改作文，请你修改同桌写的以下作文。文中共有10处语言错误，要求你在错误的地方增加、删除或修改某个单词。
增加：在缺词处加一个漏字符号（∧），并在其下面写上该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写上修改后的词。
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。
My spare time is full of interested activities. I read all kinds of books in reading-room whenever I have time. I learn much in the library than in class in this way. Sports and games keep me health enough to deal with all difficulties. My favourite was volleyball among all games. I often play with volleyball after school. Sometime I go in for social practice with my classmates outside school. Thus I can gain some social experiences.
Out-of-class activities are quite necessary for our students. Through these activities we can learn many things that can’t learned in class.