Asawell-knowndoctorinLondon,JohnSnowwaswillingtohelpord...

问题详情：

As a well-known doctor in London, John Snow was willing to help ordinary people   61   (expose) to cholera（霍乱）. He knew that only when   62   cause of it was found could the   63  (dead) disease be controlled. He has two theories in mind explaining how cholera killed people.   64  was that cholera multiplied in the air without reason; the other was   65   people absorbed it into their bodies   66   their meals. After many   67  (fail), he succeeded in finding that the drinking water was to blame because the river   68  (pollute). Without delay John Snow told the people to remove the handle from the water pump   69    that it could not be used. Soon the disease began to slow down. To prevent the disease from   70  (happen) again, the water companies were instructed not to expose people to polluted water any more. Finally "King Cholera" was defeated.

【回答】

61. exposed   62. the     63. deadly   64. One   65. that   66. with  

67. failures   68. had been polluted   69. so   70. happening

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