短文改错。
A boy who was cleaning the shoes in the street said to a young man passed by, "Let me clean your boots.
It just spends you only a penny." But the man refused. Then the boy told him that he will clean his boots for
nothing. The man agreed, and soon one of boot shone brightly. Then he put the other boot on the box, and
the boy refused to clean it if he was paid two pence for his work. The young man refused pay for anything and
went away. But the well-cleaning boot made the dirty one so bad that he could not walk on. He returned back
and gave the boy two pence.
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