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. 小题1: A．inferred B．believed C．expected D．hoped 小题2: A．peaks B．accidents C．problems D．jams 小题3: A．damaged B．caused C．led D．made 小题4: A．happy B．healthy C．voluntary D．crazy 小题5: A．had B．totaled C．got D．reached 小题6: A．youth B．students C．girls D．boys 小题7: A．raised B．lifted C．asked D．questioned 小题8: A．grown B．changed C．risen D．declined 小题9: A．old B．male C．young D．female 小题10: A．insisted B．indicated C．denied D．wondered 小题11: A．large B．small C．high D．low 小题12: A．sunk B．set C．produced D．occurred 小题13: A．reasons B．causes C．ways D．results 小题14: A．survey B．study C．figure D．effort 小题15: A．stop B．reduce C．forbid D．limit