Seldom ____ any mistakes during my past few years of working here.
He came to my class every week, but his attitude ________ he was not really interested in the subject.
Don’t you know that Australia was, as a matter of fact, _________ used to be a nation of prisoners!
_______________, the players began the game.
Having checked the doors were closed, and _______ all the lights were off, the boy opened the door to his bedroom.
—Where are we going for the National Day,the mountains or the sea?— Either will be fine with me.