In the early 19th century, an outbreak of cholera hit Europe. No one knew how to prevent or treat it. John Snow, a British doctor, felt 【小题1】 (frustrate) . But he never lost his desire to destroy cholera once and 【小题2】       all. In general, doctors in those days had two contradictory theories to explain how cholera spread, and Snow subscribed to the second theory that cholera 【小题3】 (cause) by an infection from germs in food or water. It was correct, but abundant 【小题4】 (prove) was still needed. He was determined to find out why.

Snow began by 【小题5】 (mark) on a map the exact places 【小题6】 all those who died had lived. Snow doubted if the water pump was 【小题7】 (blame). At last, John Snow was able to announce that the pump water carried cholera germs. Accordingly, he had the handle of the pump 【小题8】 (remove). Through his intervene, the disease was stopped in its tracks. 【小题9】 (fortunate), we now know how to prevent cholera, thanks to the work of John Snow. Moreover, Snow transformed the way scientists study diseases. For this reason, Snow is considered 【小题10】 father of modern epidemiology.

John Snow, a well-known doctor in London, became 【小题1】 (inspire) when he thought about helping ordinary people who 【小题2】 (expose) to cholera, a 【小题3】 (die) disease of its day. Many thousands of people died every time there was 【小题4】 outbreak because no one knew the cause of it, and John wanted to help solve the problem.

He got interested in two theories 【小题5】 (explain) how cholera killed people. He believed in the second theory 【小题6】 suggested that people absorbed the disease with their meals. In 1854, when another outbreak 【小题7】 (hit) London, he was ready to test the two theories. 【小题8】 the help of the map he made, he got a valuable clue about the cause of the disease and was able to announce that the water was 【小题9】 (blame). He also suggested the source of all water supplies 【小题10】 (examine).

John Snow, a well-known doctor in London, became 【小题1】 (inspire) when he thought about helping ordinary people exposed to cholera, a   【小题2】 (die) disease of its day. Many thousands of people died every time there was an outbreak because neither its cause 【小题3】its cure was understood. John wanted to help solve the problem.  

He got interested in two theories   【小题4】 (explain) how cholera killed people. He believed in the second theory 【小题5】 suggested people absorbed the disease with their meals. In 1854, when another outbreak hit London, he was ready to test out two theories. 【小题6】 the help of the map he made, he got a   【小题7】 (value) clue about the cause of the disease and was able to announce that the water was 【小题8】(blame). To prevent this from 【小题9】(happen)again, John Snow suggested that the source of the water supplies 【小题10】(examine). “King Cholera” was finally defeated.