Jim, Tom and Jack were three little birds. One day, their mother said to them, "Boys, it's time for you to fly (飞) down and eat sand (沙子). We birds have no teeth. Sand can help us eat some hard food."Jim and Tom did what the mother told them to do, but Jack was disobedient. He said, "I can't fly, and I don't like sand."
Day by day, the birds got older. One summer morning, the mother took them to a place to play although Jack couldn't fly well. Jim and Tom flew well. Jack flew behind them. He just cried, "Wait! Wait!"
Soon Jim, Tom and the mother got to the place. There they had fun eating, drinking, singing and playing. When it was late, they flew back to their home. What do you think they saw when they got home? Yes! There was Jack eating sand.