.Jack was still very calm, ______ the quarrel with the boss, and greeted every person he met on the way back to his office.
--Do you know when the Chinese custom_________ from? --It's hard to say. But its characteristics__________ the Tang Period.
Paper bags produced every year are ______ the world’s production of vehicles.
His spare time is made full use_______ law.
Some of the old beliefs passed down from one generation to another ________ the present thinking.
Who would you rather ______ with the teacher about the problem?