In the last decade, Chicago public schools ________ teaching of Chinese to serve 12,000 students.
My new novel has disappeared.Who _______ have taken it?
—The winner of the race is a tall and thin boy with thick glasses.—Then it _______ be my friend, Mike, who looks like a “meat ball”.
I am glad that you have managed to come.You _______ have brought wine.We’ve got plenty.
A left-luggage office is a place where bags _______ be left for a short time, especially at a railway station.
—I didn’t go to work yesterday because my car broke down.—You _______ mine.I wasn’t using it then.