One day Mozart saw an old blind street performer(卖艺人) playing the violin in the street corner. He recognized (认出; 听出) out the old man was playing one of his compositions(曲目). The old man played for some time but the hat in front of him was empty---nobody had put any money into it. Mozart asked the old man. “Now, everybody knows Mozart and likes his music.” “Do you make a living by playing the violin?” The old man said he did. And then Mozart took over the violin from the old man and began to play.

      He played very well. All the passers-by(过路人) stopped to listen to the wonderful music and soon the old man felt very surprised that the man could play so well. He asked Mozart, "Who are you, sir?" " Your colleague(同行), a poor musician like you." Then Mozart gave the violin to the old man

and went away.

阅读回答问题：

(1) What did Mozart see in the street?

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(2) Why was the hat in front of him still empty?

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(3) Whose composition did the old man play?

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(4) All the passers-by were interested in the music that Mozart played, weren’t they?

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(5) Did the old man recognize Mozart or not at last ?

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