根据下列材料，回答题TheDangersofSecondhandSmokeMostpeopleknowthatcigarettesmokingisha

共享题干题根据下列材料，回答题 The Dangers of Secondhand Smoke Most people know that cigarette smoking is harmful to their health. Scientific research shows that it causes many kinds of diseases. In fact, many people who smoke get lung cancer However, Edward Gilson has lung cancer, and he has never smoked cigarettes. He lives with his wife, Evelyn, who has smoked about a pack of cigarettes a day throughout their marriage. (46) . No one knows for sure why Mr. Gilson has lung cancer. Nevertheless, doctors believe that secondhand smoke may cause lung cancer in people who do not smoke because nonsmokers often breathe in the smoke from other people's cigarettes. (47) The US Environmental Protection Agency reports that about 53000 people die in the United States each year as a result of exposure to secondhand smoke. The smoke that comes from a lit cigarette contains many different poisonous chemicals. In the past, scientists did not think that these chemicals could harm a nonsmoker's health.(48) They discovered that even nonsmokers had unhealthy amounts of these toxic (有毒的) chemicals in their bodies. As a matter of fact, almost all of US breathe tobacco smoke at times, whether we realize it or not. For example, we cannot avoid secondhand smoke in restaurants, hotels and other public places. Even though many public places have nonsmoking areas, smoke flows in from the areas where smoking is permitted. It is even harder for children to avoid secondhand smoke． (49) Research shows that children who are exposed to secondhand smoke are sick more often than children who live in homes where no one smokes and that the children of smokers are more than twice as likely to develop lung cancer when they are adults as are children of nonsmokers. The risk is even higher for children who live in homes where both parents smoke． People are becoming very aware of the dangers of secondhand smoke． ( 50 ) 1.[不定向选择题]______________A.Recently, scientists changed their opinion after they studied a large group of??? nonsmoker B.The Gilsons have been married for 35 year C.This smoke is called secondhand smok D.However, secondhand smoke is dangerous to all people, old or younE.As a result, they have passed laws which prohibit people from smoking in many public placeF.In the United States, nine million children under the age of five live in homes with at least one smokeABCDEF确定 2.[不定向选择题]______________A.Recently, scientists changed their opinion after they studied a large group of??? nonsmoker B.The Gilsons have been married for 35 year C.This smoke is called secondhand smok D.However, secondhand smoke is dangerous to all people, old or younE.As a result, they have passed laws which prohibit people from smoking in many public placeF.In the United States, nine million children under the age of five live in homes with at least one smokeABCDEF确定

1.参考答案：E
参考解析：从原文来看，前一句讲的是人们逐渐意识到二手烟的危害性，因此接下来应首选表示人们采取措施、禁止公共场所吸烟的句子，所以选项E(因此，他们已经通过了法律，禁止人们在许多公共场所吸烟)为正确答案。
2.参考答案：F
参考解析：从原文来看，前一句提到了儿童与二手烟的问题。接下来的句子自然仍然与儿童有关，所以选项F(在美国，900万5岁以下的儿童生活在至少有一个吸烟者的家庭中)为正确答案。?3.[不定向选择题]______________A.Recently, scientists changed their opinion after they studied a large group of??nonsmoker B.The Gilsons have been married for 35 year C.This smoke is called secondhand smok D.However, secondhand smoke is dangerous to all people, old or younE.As a result, they have passed laws which prohibit people from smoking in many public placeF.In the United States, nine million children under the age of five live in homes with at least one smokeABCDEF确定

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