第四部分：阅读理解（每题3分，共45分，　建议４０分钟以内完成）
  下面有3篇短文，每篇短文后有5道题，每道题后面有4个选项。请仔细阅读短文并根据短文回答其后面的问题，从4个选项中选择1个最佳答案涂在答题卡相应的位置上。

难度Ｂ／C级
                          Cigars Instead
     Smoking one or two cigars a day doubles the risk of cancers of the lip，tongue，mouth，and throat，according to a government study．
     Daily cigars also increase the risk of lung cancer and cancer of the esophagus，and increase　the risk of cancer of the larynx(voicebox)sixfold ，say researchers at the National Cancer　Institute in Bethesda，Maryland．
     In addition，the report revealed that smoking three or four cigars a day increased the risk of　oral cancer to 8.5 times the risk for nonsmokers and the risk of esophageal cancer by four times the risk of nonsmokers．
     The health effects of smoking cigars is one of eight sections of the article“Cigars：Health Effects and Trends．”The researchers report that，compared with a cigarette，a large cigar emits up to 90 times as much carcinogenic tobacco-specific nitrosamines.   "This article provides clear and invaluable information about the disturbing increase in
 cigar use and the significant public health consequences4 for the country，”said Dr．Richard Klausner director of the National Cancer Institute，in a statement．
    “The data are clear—the harmful substances and carcinogens in cigar smoke，like
cigarettes，are associated with the increased risks of several kinds of cancers as well as heart and lung diseases．”he added．“In other words，cigars are not safe alternatiyes to cigarettes”and may be addictive．”
    “To those individuals who may be thinking about smoking cigars,our advice is—don’t．To those currently smoking cigars,quitting is the only way to eliminate completely the cancer， heart and 1ung disease risks，”warned K1ausner．
     According to a National Cancer Institute press release，there haven’t been any studies on the health effects on nonsmokers at cigar social events，but“…a significant body of evidence  clearly demonstrates all increased lung cancer risk from secondhand smoke．”

练习：
1．According co the report,smoking three orfour cigars a day
A)increases the risk of oral cancer for non-smokers．
B)greatly increases the risk of oral cancer for smokers．
C)increases the risk of more than one cancer for non-smokers，
D)greatly increases the risk of more than one cancer for smokers．

2．In the passage how many cancers are mentioned in relation to smoking cigars daily?
A)Six．
B)Seven．
C)Eight．
D)Nine．

3.What is the main idea of the article“Cigars：Health Effects and Trends”?
A)Whenitcomesto cancer，cigars arenotany saferthan cigarettes．
B)Cigars may be addictive while cigarettes are not easily so．
C)Cigars contain less harmful substances than cigarettes．
D)Increase in cigar-smoking does not affect public health much．

4．What is the doctors’advice to those cigar-smokers?
A)To give it up completely．
B)Togiveuppartofit．
C)Not to think about it any more．
D)To cure the diseases first．

5．In the context of this passage,“secondhand smoke”means
A)smoking bad-quality cigars．
B)smoking very cheap cigars．
C)being near cigar smokers when they are not smoking．
D)being near cigar smokers when they are smoking．