A farmer had some puppies（小狗） for sale,from 30 to 50.While he（1）______ （paint） an ad for the puppies,a little boy passed by and said, "Sir,they are so lovely.I want to buy one of your（2）______（dog）."
"Well,"said the farmer, "these puppies cost quite a lot of money."The boy said, "I（3）______ 89 cents already.Is that enough（4）______ （take）a look?"
"OK,"said the farmer.The dogs （5）______ （bring） to him.Four little balls of fur（软毛） appeared from the doghouse.Then the little boy noticed something else inside the doghouse.（6）______ （slow） another little fur ball appeared,and this one was （7）______ （small） than the others.It was walking strangely,trying to stand up properly.
"I want that one,"the little boy said,quickly pointing to the runt（矮个子）."Son,you don\’t want that puppy.He will never be able to run and play （8）______ you like other dogs,"said the farmer.
Then the little boy rolled up（卷起） one leg of （9）______（he） trousers.His leg had a steel.brace（钢支架） on it.Looking back up at the farmer,he said,"You see,I don\’t run too well myself,(10)______ he needs someone who understands as well."
"How much?"asked the little boy."No charge,"answered the farmer."There\’s no charge for love and understanding."