---- Sorry, I have to ______ now. It’s time for class.---- OK, I’ll call back later.
It is a ________,but is a chance as well.
How long have you ________ in the army?
—Why did Tony leave our company? —He was________ a better job at Haier.
________that you come here earlier tomorrow or you'll be in trouble.
Shut the window,________ it'll get too cold in here.