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。
Music is one of the arts. It is like the speaking language, but it uses sounds. Who invented music?Who sing the first song? No one knows exactly the answers of these questions. But we know thatmusic plays an important part almost everyone’s life. Baby and young children love to hearpeople singing to them. When they are a little old, they like to sing the songs they have heard.When children go to the school, their world of music grows. In the middle grades students take music lessons. When they reach high school, we become interested in listening pop music. Musichas meaning for everyone. It can make people happy but it can make them sad.