完形填空。 A store owner was putting 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 store owner's sign. " 3 are you going to sell the puppies for?" he asked. The store owner replied," 4 from $30 to $50. " The little boy 5 in his pocket and pulled out some 6 "I have $2.37,"he said," 7 I please look at them?" The store owner 8 and whistled and out of the kennel (狗窝) came a lady dog,who ran down the aisle(过道) of his store, 9 by five puppies. One puppy was 10 . Immediately the little boy singled out the puppy and said, "What's 11 with that little dog?" The store owner explained that the veterinarian(兽医) had 12 the little puppy and had discovered that it didn't have a hip socket. It would always walk slowly and with difficulty. It would always be lame. The little boy became 13 "That's the little puppythat I want to buy. " The store owner said, "No,you don't want to buy that little dog. If you really want him,I'll just give him to you. " The little boy got quite upset. He looked 14 into the store owner's eyes,pointing his finger and said, "I don't want you to give him to me. That little dog is worth 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 16 I have him paid for. " The store owner answered, "You really don't want to buy this little dog. He is 17 going to be able to jump and play with you like the other puppies. " To his surprise,the little boy reached 18 and rolled up his pant leg to show a badly twisted,crippled(残疾的) left leg 19 by a big metal brace(支架). He looked up at the store owner and softly replied," Well,I don't run so well myself,and the little puppy will need someone who 20 !"