6.Smoking is not good for our health. Nicotine __46__ the cigarette hurts our lungs and can cause cancer. However, in recent years more and more young people have __47__ smoking. Obviously, many young people enjoy smoking, partly because it gives them the false __48__ of freedom. Besides, smoking may help them __49__ friends with other young people. It is a __50__ that they are too young to think about the long-term effect of smoking on their health.
(A) at (B) for (C) on (D) in