Once there was a rich man named Marcus. One day, he was walking in his garden when he saw a strange________with beautiful feathers and a sweet voice in a tree. Marcus________went near the tree and caught the bird, because he thought he could________it and get lots of money.

"Don't think about making money through me!" said the bird, "________will buy me, because I will lose my beauty and sweet voice if I am in a cage." Marcus's hope of making money was lost. He became angry and wanted to________the bird for the meat.

Then the________bird said, "Well, set me free. In return I shall teach you________simple but useful rules, which can be good for you."

Marcus didn't believe the bird________, and he was afraid that the bird would fly away. However, the bird said it would keep its________. Marcus wanted to try. He set the bird free and it sat on the branch of a tree. It became________again.

Marcus asked, "Now teach me the rules." "Certainly," said the bird.

Then the bird taught Marcus the________: The first rule is "Never believe everything others say". The second rule is "Never be sad about something you don't have". The third rule is "Never throw away what you have in your hand".

"You silly bird," shouted Marcus, "These rules are known to everyone. You cheated（欺骗）________."

But the bird said, "Today, you had me in your hand, but you threw me away. You believed all that I said. And you are sad about not having me.________the rules are simple, you have never followed them. Now have you got the value of the rules? Just sit down and think________a minute." With these words, the bird________and was away from his sight.