David has always wanted to study Chinese kung fu. He heard 
that there was a Chinese kung fu school on the mountain. So one day, he went and found the school. When David met the headmaster， he told the headmaster he wanted to study Chinese kung fu there. The headmaster nodded and agreed.
But the school has a strange rule. All the students need to be silent. They can only speak two words every three years. That means students have a long time to think about what they really want to say. They must use their two words wisely.
Three years went by and it was David's first chance to speak. There were lots of things he wanted to say. He thought for a second before saying, "Food bad." But after that, the food in the school did not change at all,
Another three years passed and David got another chance to speak. He said,"Bed hard." But still, he didn't get a new bed. David felt very disappointed. So after another three years, he went to see the headmaster and said, "I quit (退学)."
"I'm not surprised," the headmaster replied. "You only ever (总是) complain.
