31.The company had about 20 notebook computers but only one third _______used regularly . Now we have 60 working all day long.
— Did you scold him for his mistake? — Yes, but _____ it.
It will be five years ____ we meet again.
He said, “_____ a long way to school. ______ a long way to go yet before we arrive.”
It is ____ waste of time for young men to devote themselves to playing computer games on ___ Internet only for _____ pleasure.
---What’s the chief ______ of the world this year? ---I think the Twin- Tower was destroyed.