根据首字母填单词，完成短文。
Do you know Wolf Amadeus Mozart ? The great composer , Mozart , s      writing music when he was just a little boy. Here’s a story about him when he was a  child .
His father u   to give his sister , Nannerl , music lessons o     the piano .And little Wolfgang Mozart was in the room .He watched and listened to every note his sister p    .One day ,when her lesson was o    ,he asked w     he could have the music lesson . But his father said no to him because he was too l     to learn it .
When his father and his sister left the room .,he went up to the piano and pressed the k    .He smiled and the music s     beautiful .His father heard him and came to see him ,He was playing well w     any help .His father decided to give him the music lessens .
Soon he played as w    as his big sister , Nannerl . He learned so quickly that his father was very happy .But when he started to write music by himself , his father was surprised ,.No one believe that a little of five could write such beautiful music .He was an amazing child ,a b    musician .