He takes a part-time job every summer vacation, but most of the money he earns （）   playing computer games in the net bar. 

A．Trucks
B．Headaches
C．Burninggarbage
D．Burning coal and oil

A．Americans value strong life-long friendships
B．American friendship is not a life-long one
C．Americans develop friendship slowly
D．Americans do not make friends with strange people