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16.Early in the last century,yellow fever was one of the worst diseases known.Thousands of people (166)died of it every year.It had been suggested that the yellow fever virus is transmitted by the bite of a certain mosquito.It was (167)thought(认为) that a (168)ccertain kind of mosquito would bite a person ill with yellow fever and then,flying elsewhere,bite (169)another person and(170)ggive him the disease.To prove whether or not this was true,Dr.James Carroll,allowed (171)ssuch a mosquito to bite him after it had bitten a yellow fever patient.
He knew the bite of this mosquito might (172)ccause his death;nevertheless,he made the (173)experiment(尝试).
Dr.Carroll became very ill of yellow fever but finally(174)recovered(恢复).The risk this hero took,however,helped to save the lives (175)of thousands of people.

分析 本文介绍了上个世界黄热病的情况.

解答 166.died 167..thought168..certain 169..another 170..give 171..such 172.cause 173.experiment 174.recovered 175.of
166.died  考查动词,有前句可知yellow fever was one of the worst diseases known,所以每年死的人很多.
167.thought 考查动词.此处是固定句型it was thought that…据认为…
168.certain 考查形容词.此处certain为形容词,意思是某个,某种.
169.another 考查不定代词.根据前句提到a person,此处表示另外一个人.
170.give 考查动词.give和前句的bite并列动词,做谓语.
171.such 考查代词.such a 为固定表达,意思是这样的一个…
172.cause 考查动词.根据这句话意思,cause动词,引起造成,蚊子的叮咬可能造成死亡.
173.experiment 考查名词.make an/the experiment为固定短语,做实验.
174.recovered 考查动词.recover此处意思是恢复,根据前句的 became 时态呼应,所以用过去时.
175.of 考查介词.of此处表示…的.the lives of  thousands of people上千人的生命.

点评 做这种类型的题目要逐句分析,前后一致.选择答案时,要考虑整个句子的内容,包括搭配、时态、语法等. 答案全部填完后,再通读一遍,检查是否通顺流畅了,用词得当,意思正确.

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