Once upon a time, there lived an old dog. When the old 1 was young, he was a great hunter (猎犬). He was strong enough and he could run quickly. 2 his owner loved him very much. But later he was old and he was becoming slow and 3.
One day, the old dog and his owner were walking in the forest. The dog saw a pig 4 behind a tree. He caught the pig by its 5. But the pig's tail was short and the dog's teeth were weak and the pig got away.
"My teeth were much stronger when I was young, "6 the dog. "I hope my owner isn't angry with me. "
When the owner saw the pig run away, he was angry. "You are a useless (没用的)dog!" he shouted. "What will my 7 eat tonight?"
The dog was sad. "My owner, "he said, "it is not my fault that I'm 8. For many years, I've helped you to feed your family. Am I worth (价值)9 to you now?"
The owner realized that he was wrong. "You're right, "he said. "I should praise you for your 10these years instead of blaming (责怪)you for being old. "
