增加：在缺词处加一个漏字符号（ ∧ ），并在其下面写出该加的词。
删除：把多于的词用斜线（ \ ）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。
Today I will introduce three famous musician in the world. Known as “ the father of the symphony”, Joseph Haydn was an Austrian composer. It was him that changed the symphony into a long piece for a large orchestra. Hayden used to working at the court of a prince in eastern Austria, there he became a director of music. Having worked there for 30 years, he moved to London and became very successfully there. Mozart was another well-known Austrian composer, possibly the greater musical genius of all time. He passed away at an early age and composed no more than 600 pieces of music. Haydn met Mozart in 1781 and was very impressive with him. The third famous musician I will introduce is Beethoven, who was born in Bonn, Germany. He moved to Vienna and stayed there for rest of his life. As he grew older, he began to go deaf. Even when he was complete deaf, he continued composing.
