完形填空. One day Mozart  saw  an old  man l the violin  on  a  street corner. He 2 that  the  old  man  was playing 3 0f his compositions (乐曲). The old man played 4 some time, but the cap 5 him was still empty-nobody put any money 6 it. Mozart asked the old man, 'Do you often play music composed by Mozart?' The old man answered, 'Yes, because everyone has heard of Mozart and likes his music. '.' Do you make a living by playing the violin?' The old man said he did. Mozart 7 the violin from the old man and began to play. He played so 8 that, all the passers-by(过路人) stopped _  9 . the wonderful music. The old man was 10 that. the man could play so well. He asked Mozart, 'Who are you, sir?' 'A poor musician like you. ' Mozart gave the violin to the old man and went on his way. (     )l. A. played (     )2. A. looked (     )3. A. one (     )4. A. at (     )5. A. in front of (     )6. A. on (     )7. A. lent (     )8. A. well (     )9. A. listening to (     )10. A. surprised B. playing B. finds B. some B. with B. in the front B. into B. bought B. nice B. to listen B. surprise C. play C. looked for C. any C. for C. on C. out C. took C. good C. to listen to C. surprising D. plays D. found out D. all D. on D. in D. at D. brought D. best D. listening D. nervous