完形填空。 Mozart and an Old Performer One day Mozart ()saw an old blind street performer (卖艺人) playing the violin in the street corner __ 1 __ a hat in front of him. He found out the old man was __ 2 __ one of his compositions (作品).The old man played for __ 3 __ , but still nobody put any money into his hat. Mozart asked the old man, 'Do you often play compositions by Mozart?' 'Yes, __ 4 __ ,' answered the old man. 'Now, everybody knows Mozart and likes his music.' 'Do you __ 5 __ a living by playing the violin?' The old man said he __ 6 __ Mozart took over the violin from the old man and began to play. He played so well __ 7 __ all the passer-by stopped to listen the wonderful music and soon the old man felt very __ 8 __ that the man could play so well. He asked Mozart, 'Who are you, sir?' 'Your colleague (同行) , a poor __ 9 __ like you.' Then Mozart gave the __ 10 _ back to the old man and went away. (     )1. A．on (     )2. A．writing (     )3. A．sometime (     )4. A．you (     )5. A．make (     )6. A．certainly (     )7. A．which (     )8. A．happy (     )9. A．musician (     )10. A．money B．by B．playing B．sometimes B．it is B．buy B．did B．how B．worried B．artist B．violin C．with C．reading C．some time C．Mr. C．give C．yes C．that C．disappointed C．scientist C．food D．to D．listening D．some times D．sir D．take D．sorry D．what D．surprised D．writer D．hat