题目内容：

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

John Snow was a famous doctor in London, 1. was so expert that he attended Queen Victoria as her personal physician. But he was famous for 2.(defeat) “King Cholera”.

Cholera was a 3.(dead) disease and neither its cause nor its cure 4.(understand). John Snow wanted to face the challenge and solve the problem. He suspected that people absorbed this disease into their bodies when 5. (have) their meals. So when another severe outbreak hit London, he began his enquiry. He found that many victims6.(link) to the outbreak were near the water pump, so he had the handle7.(remove). Soon afterwards the disease slowed down. He drew a 8. (conclude) that the polluted water was 9.(blame).

The water companies were instructed not to expose people 10.polluted water any more. Finally “King Cholera” was defeated.