_____ is known to us all that the sun rises in the east.

Eventually, she has recognized ____, whatever happens and however bad ____ seems today, life still goes on and everything will be better tomorrow．

—Is your neighbor Mr. King a man with good manners?—Actually, he is ________ but polite. And nobody likes to talk to him.

Charlie Chaplin found __________ difficult to entertain the audience at first.

We travelled together as far as Chicago, _____ we said goodbye to each other.