A．It is sure that the use illegal drugs call cause life-long dependency.B．The children who smoke will have their life shorten.C．Columbia University on Drugs has studied the problems of smoking.D．Most eighth graders use illegal drugs.
A．It is sure that the use illegal drugs call cause life-long dependency.
B．The children who smoke will have their life shorten.
C．Columbia University on Drugs has studied the problems of smoking.
D．Most eighth graders use illegal drugs.