问题
完形填空
John Snow was born and worked as a __36__ in Great Britain．Exactly, he was an anaesthetist，37 means that he put people to sleep during operation．He also began to experiment using the same drugs to help women when they had 38 ．That is why he became the doctor who 39 Queen victoria to give the birth of her babies． At the time he lived，cholera was the most 40 disease．Neither its cause，nor its 41 was understood．So many thousands of people died 42 there was an outbreak．John Snow was 43 to help ordinary people 44 from cholera．He 45 the disease began in the stomach and the patients died quickly after severe vomiting(呕吐)and diarrhea (腹泄)．46 ，he believed cholera resulted from water．When another 47 hit London in 1854，John Snow set to work． John Snow approached the problem in a systematic way．He marked on a map 48 all the dead people had lived and found many of the 49 were near a water pump．It seemed the water was the 50 ．So he collected information about the 51 habits of the dead people and used them eventually to prove his theory．With the information 52 ，John Snow was sure that 53 water was the cause． Then people were required to 54 the water company to supply them with clean water．Thanks __55___ John Snow there was no more outbreaks of cholera．
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答案
小题1:D
小题2:C
小题3:D
小题4:C
小题5:D
小题6:A
小题7:A
小题8:D
小题9:C
小题10:A
小题11:A
小题12:C
小题13:B
小题14:C
小题15:B
小题16:A
小题17:C
小题18:B
小题19:C
小题20:A