Parents complain their children are behaving unreasonably _____children consider their parents to be old-fashioned.
_____________ worries me the way he keeps changing his mind.
—How much if I wan to take one?—You can take as many as you like because they are free of _____.
The young student is ____as a writer. It’s_____to all his teachers.
Do you know the___of the saying I just quoted?
一Let’s try operating the machine right now.一Wait.Better read the ______ first.