At present , the butter factory is still polluting the river though it _____to stop.
A good teacher must ______ to his students the importance of a proper learning method.
I can’t _________ his rudeness anymore, so we began to quarrel.
He was educated at the local high school, ______ he went on to Beijing University.
_______, and we will do the work better.
With just four years _______, the Brazil Olympic organizers have promised to deliver an equally inspirational ceremony.