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 — so expert, indeed, that he attended Queen Victoria as her personal   1. (physics). But he became inspired when he thought about 2. (help) ordinary people exposed to cholera. This was the 3. (die) disease of its day. 4. its cause nor its cure was understood. So thousands of   5. (terrify) people died every time there was   6. outbreak. John Snow wanted to face the challenge and solve this problem. He knew that cholera would never be controlled until its cause 7. (find).

He was interested in two 8. (theory) that possibly explained how cholera killed people. The first suggested that cholera multiplied in the air. A cloud of dangerous gas floated around until it found its victims. The second suggested that people absorbed this disease   9. their bodies with their meals. From the stomach the disease   10. (quick) attacked the body and soon the affected person died.