Ⅰ.用适当的介、副词填空
1．John Snow was a famous doctor in London—so expert, indeed, that he attended Queen Victoria as her personal physician.
2．This was the deadly disease of its day.
3．A cloud of dangerous gas floated around until it found its victims.
4．The second suggested that people absorbed this disease into their bodies with their meals.
5．As the disease spread quickly through poor neighbourhoods, he began to gather information.
6．He discovered that these people worked in the pub at 7 Cambridge Street.
7．Next, John Snow looked into the source of the water for these two streets.
8．Soon afterwards the disease slowed down.
9．In another part of London, he found supporting evidence from two other deaths that were linked to the Broad Street outbreak.
10．With this extra evidence John Snow was able to announce with certainty that polluted water carried the virus.
