Don’t leave the water ________ while you brush your teeth.　

Wu Juping, ______ the most beautiful mother, is also popular with foreigners for her saving the baby _________ off the high building.

. “Things __________ never come again!” I couldn’t help talking to myself. 

They really have a great time too , designing everything , drawing the blue prints , _________the angles and so on .                   

I still remember      to the Three Gorges and what I saw there.