Ⅱ. Cloze Test(10 points, 1 point for each item)

　　下列短文中有十個空白，每個空白有四個選項。根據上下文要求選出最佳答案。

　　Yellow fever is a disease of warm lands that is found mainly along the shore of the Atlantic Ocean. It was first 　11　 in the Americas, but may well have come from Africa and reached the New World with or soon after Columbus. Until about fifty years ago, yellow fever was still one of the most 　12　 diseases in the United States, 　13　 many died in repeated outbreaks. An outbreak which was to lead 　14　 surprising developments was one that happened in Cuba during the Spanish-American War.

　　15　, an army group under Major Walter Reed was sent there in June, 1900 　16　 orders “to give special attention to questions concerning the cause and prevention of yellow fever”. In a daring group of experiments using human beings, Major Reed proved the truth of an idea advanced in 1881 by a Cuban doctor, that the city type of mosquito 　17　 the disease.

　　The successful result of these experiments gave 　18　 to another and still more important idea: kill off the city type of mosquitoes and there will be no more yellow fever. 　19　, these mosquitoes are one of the easiest types to destroy. They are 　20　 in pools of quiet, warm water, within a short distance to people's home.

　　11.A.seen　　　B. looked into　　C. noticed　　D. felt

　　12.A.feared　　B. fearing　　　　C. fear　　　 D. felt

　　13.A.which　　 B. where　　　　　C. that　　　 D. how

　　14.A.for　　　 B. in　　　　　　 C. to　　　　 D. at

　　15.A. As results　　　　　　　　 B. As the result

　　C. As result　　　　　　　　　D. As a result

　　16.A.for　　　B. on　　　　　　　C. with　　　　D. in

　　17.A.passed on　　　　　　　　　B. passed to

　　C. passed over　　　　　　　D. passed away

　　18.A.time　　B. result　　　　C. birth　　　　D. order

　　19.A.Unfortunately　　　　　　B. Fortunately

　　C. Consequently　　　　　　D. Subsequently

　　20.A.fed　　B. lived　　　　　C. made　　　　D. born

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