31._________reasonable, the idea he to create a friendly environment attracted much public attention.
His father __________ him for a doctor, but he preferred to be an artist.
__________to give up smoking, he threw away his __________ cigarettes.
He always __________ the mistakes made by his rivals.
He's decided to move to another city, because __________ doesn't agree __________.
—Did Peter fix the computer himself? —He __________,because he doesn't know much aboutcomputers.