单选题 Polio"s growing virulence seems actually to have been a by-product of a new standard of middle-class cleanliness. In the unsanitized past, infants and small children had been exposed to polio very early on, during a stage of life when paralysis was rare and lifelong immunity easily induced. But pristine bassinets, pure food and drink, freshly mopped floors had all helped to keep the virus at bay until children were older, when it was far more likely to cripple or kill. Franklin Roosevelt"s five children escaped polio. Their father did not. On August 10, 1921 , FDR himself was stricken at Campobello. A less resilient man would have admitted defeat, retreated inward. FDR, in characteristic fashion, sought a solution to polio; 1924, he established what became the Warm Springs Foundation in Warm Springs, Ga. There, he hired physicians and therapists, converted a creaky resort into a treatment center, even conducted exercises in the pool himself. In 1928, when FDR agreed to return to active politics and run for Governor of New York, his foundation was in financial trouble. A series of President"s Birthday Balls, held on January 30 of each year, seemed to provide the answer. These were gala evenings staged throughout the country to which celebrants paid to come, " Dancing So Others May Walk. " It"s hard to imagine now how popular Franklin Roosevelt once was in Depression-wracked America. But the President"s popularity inevitably waned, and so did foundation funds. By 1937 , the year of FDR"s abortive purge of the Supreme Court, it was clear that the cause of polio must be separated from that of the increasingly controversial politician who had declared war upon it. In September, FDR announced the creation of an entirely independent National Foundation for Infantile Paralysis to " lead, direct, and unify the fight on every phase of his sickness. "It was to begin functioning in January 1938. A new nonpartisan board of trustees was created to insure that Republicans could send in contributions without appearing also to support "That Man"in the White House.

单选题 Paragraph 1 starts with "Polio"s growing virulence seems...middle-class cleanliness. "Judging by reading the paragraph, one may conclude the best explanation to it is that______.

A、 as middle-class families complied with a new standard of cleanliness, there came more severe attacks of polio as a result
B、 as middle-class families took no notice of cleanliness in the past, the by-product of a new standard of cleanliness didn"t result
C、 as they upgraded their standard of sanitation, middle-class families damaged immunity to polio, bringing acute attacks of the sickness
D、 as acute attacks of polio resulted from following a new standard of cleanliness, middle class families should be held responsible

【正确答案】 C

【答案解析】解析：由题干定位到原文第一段，“In the unsanitized past，infants and small children had been exposed topolio very early on”可知小儿麻痹症(polio)并没有伴随时代发生变化，改变的是“a new standard ofmiddle-class cleanliness”，也就是说更加整洁的环境让人的免疫力下降，因此受到同样的病毒侵袭的时候，会受到更大的影响。只有C项符合原文表述。

单选题 As related in Paragraph 3 several things happened following FDR falling victim to the attack of polio which were what appear in the following except______.

【正确答案】 A

【答案解析】解析：由题干定位到原文第三段，在罗斯福患小儿麻痹症之后，“he established what became the WarmSprings Foundation in Warm Spring”对应于B选项；而C选项之中的“some rehabilitation specialists”是对原文“he hired physicians and therapists”的概括；而D选项的关键词“hydrotherapy”(水疗)是对原文“even conducted exercises in the pool himself”的同义转述，所以罗斯福没有做的事情为A选项，故A为答案。

单选题 FDR was loved by people, as is shown by " ... by popular Franklin Roosevelt once was..." in Paragraph 5. Based on the knowledge of the world, one many decide one of the sentences in the following that best explains it is______.

【正确答案】 C

【答案解析】解析：由题干定位到原文第四段，题目要求我们“Based on the knowledge of the world”，也就是要求我们从时代背景去关注罗斯福受人爱戴的表现，原文中的“in Depression-wracked America”提醒我们当时美国正在遭受经济危机的影响，在这一背景下，C选项中的“throughout the country”(遍布全国)和“celebrants paid to come”(社会名流出资参加)等细节更能凸显总统受人爱戴。

单选题 According to the last paragraph the cause of polio was separated from the handling of Roosevelt, the reason behind which was most probably that______.

【正确答案】 D

【答案解析】解析：由题干定位到原文最后一段，这一措施的实施在之前的对应信息为“the President’s popularityinevitably waned，and so did foundation funds”，D选项为该句的前半句，也就是主要的原因，故为正确答案。B选项是该句的后半句，不构成主要原因。A选项是这一措施的结果和表现形式，而非原因。故本题选D。

单选题 The last paragraph ends with"... to insure that Republicans could send in contributions... in the White House" which shows that in raising funds for National Foundation for Infantile Paralysis there still got involved______.

【正确答案】 A

【答案解析】解析：题目定位于原文末端结尾处，首先捐款的接受机构是“A new nonpartisan board of trustees wascreated”，这样做是为了在捐款的同时不会“appearing also to support‘That Man’in the White House”，所隐含的背景就是党派之间还是有分歧的，所以为了募捐，接受捐款的必须是一个非党派的机构，答案为A。