——Dad, why should I stop _____ computer games?——For your health, my boy. 

Bob is a football fan. He often asks me _______ football matches with him.

Father is sleeping . You’d better __________ quiet .

－How about ______ basketball this afternoon, Tom? －That’s a good idea.

 —       a volunteer is great.—I think so. Some of us want      volunteers for the London Olympics.