A storeowner was fixing a sign above his door that read "Puppies for Sale". Signs like that have a
way of      1      small children, and     2   enough, a little boy appeared under the storeowner's sign. "How much are you going to     3     for the puppies?" he asked. The storeowner replied, "     4       from $30 to $50."
     The little boy     5     his pocket and pulled out some      6   . "I have $ 2. 37, " he said. "Can I please
look at them?"
      The storeowner smiled and whistled and a lady ran out of the store    7   by five tiny balls of fur. One
puppy was lagging (蹒跚) rather behind.    8    the little boy singled out(挑选出) the lagging puppy and  
said, "What's wrong with him?"
       "He limped and would be always    9   , " the storeowner explained. The little boy became excited.
"That's the    10    little puppy that I want to buy. "
     The storeowner   11   , "No, you don't want to buy that little dog.    12   you really want him, I'II just
give him to you. "
       The little boy got quite   13   . He looked straight into the storeowner's eyes and said, "I don't want
you to give him to me. That little dog is    14   every bit as much as all the other dogs and I'll pay    15    
price. In fact I'll give you $ 2. 37 now, and 50 cents a month
until I have him paid for. "
      The storeowner reminded again, "You really don't want to buy him. He is      16    going to be able
to     17     and play with you like the other puppies. "
     To this, the little boy rolled up his leg to show a     18      twisted, crippled (贱疾的) left leg     19     by a big metal brace. He looked up at the storeowner and softly replied, "Well, I don't run so well myself, and the little puppy will need someone who     20   ! Don'tyou think so?"