Today, as in every other day of the year, more than 3,000 US adolescents (少年) will smoke their first cigarette on their way to becoming regular smokers as adults.During their lifetime, it can be __1__ that of these 3,000 about 23 will be murdered, 30 will die in traffic __2__， and nearly 750 will be killed by a smokingrelated disease.The number of deaths __3__ by cigarette smoking outweigh all other factors, whether __4__ or involuntary, as a cause of death.Since the late 1970s, when daily smoking among high school seniors __5__ 30%, smoking rates among __6__ have declined.While the decline is impressive, several important issues must be __7__.First, in the past several years, smoking rates among youth have __8__ very little.Second, in the late 1970s, smoking among __9__ high school seniors exceeded(超过) that among female by nearly 10%.The statistic is reversing.Third, several recent studies have __10__ that high school dropouts(辍学者)have excessively __11__ smoking rate, as much as 75%.Finally, though significant declines in adolescent smoking have __12__ in the past decade, no definite __13__ for the decline to exist.Within this context, the National Cancer Institute (NCI) began its current __14__ to take the most effective measures to __15__ smoking level among youth.
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小题1:C
小题2:B
小题3:B
小题4:C
小题5:D
小题6:A
小题7:A
小题8:D
小题9:B
小题10:B
小题11:C
小题12:D
小题13:A
小题14:D
小题15:B
题目分析：本文讲述了在过去几十年里年轻人抽烟的比率有所下降，并分析了具体的原因。
小题1:C 动词辨析。A推理B认为C预料D希望；3千人里有23人被预料将死于谋杀。
小题2:B 上下文串联。根据横线前的traffic说明这里是指交通事故。
小题3:B 动词辨析。A破坏B导致C带领D生产了；由吸烟所导致的死亡人数超过所有其它的原因。
小题4:C 上下文串联。根据横线后面的involuntary说明C正确。
小题5:D 动词辨析。A有B共计C得到D达到；指这个数字达到了30%。
小题6:A 上下文串联。根据第8空的smoking rates among youth说明这里讨论的青少年的抽烟。
小题7:A 动词辨析。A提出B举起C要求D询问；有几个重要的因素要被提出来。
小题8:D 上下文串联。根据第6空后的declined说明整个数据是在下降。
小题9:B 上下文串联。根据that among female说明这里是拿男性和女性抽烟的数据进行对比的。
小题10:B 动词辨析。A坚持B显示C否认D想知道；最近的研究显示…
小题11:C 形容词辨析。A大B小C高D低；指高中辍学者的抽烟率太高了。说明这个现象很严重。
小题12:D 动词辨析。A下沉B设置C生产D发生；尽管青少年抽烟比率下降过去几十年已经发生。
小题13:A 用法辨析。横线后面的for the decline说明A正确，名词reason与介词for连用。
小题14:D 名词辨析。A调查B研究C数据D努力；NCI开始采取措施努力降低吸烟的比率。
小题15:B 调查辨析。A停止B降低C禁止D限制；NCI开始采取措施努力降低吸烟的比率。
点评：本文是关于年轻人抽烟驴下降的话题，从本篇完型可以看出考生对首段应该给与足够的重视，因为往往它就是文章的中心，它体现的观点往往决定了全文的观点，所以多花一点时间看首段是永远是值得的。同时考生在选择答案时要根据上下文的复现或同现以及这些词之间的有机联系来确定答案。由于完形填空的文章是一个意义相关联的语篇，围绕一个话题论述，因此在行文中词语的重复、替代、复现和同现现象是不可避免的。