阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

There are two【小题1】(importance) kinds of music in the world — one【小题2】(write) down and【小题3】other is not. Many people earn【小题4】(them) living by writing music. They write songs for pop stars and music for films and TV plays. Folk music has been passed down from one generation to another, which at first was never written down. People learned the songs from their 【小题5】(family), relatives, neighbors and friends in the same village. Early【小题6】(perform) of music were popular and respected, they used【小题7】(learn) hundreds of songs by heart. This was at a time【小题8】there was no radio, TV or cinema. Many of the country people could neither read nor write. In this way stories were passed on from one person to another. In some parts of the world nowadays, you often see musicians performing in the streets to passers-by. They put a cap on the ground【小题9】front of them, into which people【小题10】like the music can drop coins.