This story happened in a small village in North America, where a disabled boy named Tom lived with his parents. When Tom was born, his right leg was a little twisted (变形的). When Tom could neither walk nor stand upright for two years, his parents took him to a doctor. After a careful examination, the doctor said complete recovery was impossible. So the doctor made a structure of iron rods (杆) that could be tied through Tom's shoe to a belt over his knee. With the help of the structure, Tom could stand properly and walk at times, and his life became a little easier than before. But one thing always bothering him was that he could not play like other children, although he was still happy.
On the way to Tom's school, there was a small flower shop. Its owner was a kind old man. In this shop, there lived his five small pet puppies. One of the puppies was lame (瘸的). It always dragged its leg and followed the rest of the puppies. Tom often stood in front of this flower shop after school and watched the puppies. Of the five, Tom liked that little lame puppy most.
One day, Tom saw a board hanging in front of the shop. It read "Puppies for Sale at $50" Tom went straight into the shop. Pointing at the lame puppy, he asked the old man to sell it to him. Tom took a $5 note out of his pocket and gave it to the old man. "I only have $5 now and you keep it. I'll pay 50 cents a month for the rest," Tom said. "But it is a puppy which will limp for the rest of its life. It will never be able to run with you or play with you in the park. Do you still want to buy it?" the old man asked in surprise.
Tom told the old man firmly, "Yes, I want this puppy." Then the old man returned Tom's $5 and said, "If you want this puppy, I'll give it to you for free."
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Tom got a little upset after hearing this from the old man.
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Then, Tom approached the lame puppy with his twisted right leg.