It seemed that the water led to cholera. John Snow looked into the s    of the water for these two streets. He found that it came from the river,     had been polluted by the dirty water from London. Immediately John Snow told the astonished people in Broad Street to r     the handle from the water pump so it could not be used. Soon the disease began to slow  .
John Snow had shown that cholera was spread by germs and not in a cloud of gas.     addition, he found two other deaths in another part of London that were concerned with the Broad Street outbreak. A woman, who had moved away from Broad Street, liked the water so much that she had had it delivered from the pump to her house every day. Both she and her daughter, who often visited her,    (死掉)of cholera after drinking the water. With this extra  （证据） , John Snow was able to announce with certainty that polluted water carried the disease.
To p    this from happening again, John Snow suggested that all water supplies be examined and new methods of      （处理）with polluted water be found. The water companies were also instructed not to expose people to polluted water anymore. Finally “King Cholera” was d