完形填空。 A boy who was cleaning shoes in the street said to a young man 1 , 'Let me clean 2 shoes.' The young man said, 'No, thank you.' 'You may 3 me only a pound,  sir.' said the boy.  But the young man refused 4 . Then the boy told him that he would clean his shoes for 5 . The young man agreed to this, and soon one of his shoes was shining brightly. The man put 6 shoe on the boy, but the boy refused to clean it 7 he was paid two pounds for his work.  The young man refused to pay anything and went 8 . But the dirty one looked so 9 that he couldn't walk away. He had to 10 back and gave the boy two pounds.  In a very short time his shoes shone brightly. (     )1. A. passing by (     )2. A. his (     )3. A. cost (     )4. A. again (     )5. A.  something (     )6. A. other (     )7. A. unless (     )8. A. out (     )9. A. good (     )10. A. turn B. passed by B．your B. pay B. too B. anything B. another B. if B. away B. bad B. open C. pass to C．my C. take C. also C. nothing C. the other C. after C. off C. well C. close