题目内容：

短文填空 （共5小题；每小题1分，满分5分）

By the time he was 14, Mozart had    1.    many pieces for the harpsichord, piano and violin, as well as for orchestras. While he was still a    2.   , Mozart was already a big star and   3.     Europe giving concerts. Haydn met Mozart in 1781 and was very   4.    with him. “He is the greatest composer the world has known,” he said. The two were friends until Mozart’s    5.    in 1791.