—You must have met him the other day. —Oh, no, I ________ .
Obviously the measures taken by the local government have_______ the solution to drinking water problems in this region.
--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.