题干本题共包含 5 个小题

Today ,as in every other day of the year ,more than 3000 U.S. adlescents will smoke their first cigarette on their way to becoming regular smokers as adults. During their lifetime,it can be expected that of these 3000 about 23 will be murdered,30 will die in traffic accidents, and nearly 750 will be killed by a smoking-related disease. The number of deaths attributed to cigarette smoking outweithts all other factors, whether voluntary or involuntary, as a cause of death.
Since the late 1970s, when daily smoking among high school seniors reached 30 precent , smoking rates among youth have declined . While the decline is impressive ,several important issues must be raised.
First, in the past several years,smoking rates among youth have declined very little. Second,in the late 1970s ,smoking among male high school seniors exceeded that among female by nearly 10 percent . The statistic is reversing.Third ,several recent studies have indicate high school dropouts have excessively high smoking rates, as much as 75 percent .
Finally, thouth significant declines in adolescent smoking have occurred in the past decade,no definite reasons for the decline exist. Within this context,the Naional Cancer Instiute (NCI) began its current effort to determine the most effecive measures to reduce smoking levesl among youth.

单选题1

According to the author, the deaths among youth are mainly caused by ().

Atraffic accidents

Bsmoking-related desease

Cmurder

Dall of these

正确答案

B

答案解析

单选题2

Every day there are over()high school strdents who will become regular smoker.

A75

B23

C30

D3000

正确答案

D

答案解析

单选题3

By "dropout" the author means().

Astudents who failed the examination

Bstudents who left school

Cstudents who lost their way

Dstudents who were driven out of school

正确答案

B

答案解析

单选题4

The reason for declining adolescent smoking is that ().

ANCI has taken effective measures

Bsmoking is prevented among high school seniors

Cthere are many smokers who have died of cancer

Dnone of these

正确答案

D

答案解析

单选题5

What is implied but not stated by the author is that ().

Asmoking rates among youth have declined very little

Bthere are now more female than male smokers among high school seniors

Chigh smoking rates are due to the incease in wealth

Dsmoking at high school are from low socio-economic backgrounds

正确答案

B

答案解析