参考答案

I. 1.attend　2.suspect　3.link　4.pollute　5.handle

II. 1. put forward 2. expose　to 3. were absorbed in 4. are to blame 5. drew a conclusion 6. link　to 7. be strict with 8. Apart from 9. make sense 10. lead to

III. 1.deadly　2.cure　3.absorbed　4.neighbourhoods

　　5．severe/serious　6.blame　7.polluted

　　8．Measures/Steps　9.source　10.instructed

IV. John Snow was a well-known doctor in London in the 19th century. He wanted to find the cause of cholera in order to defeat it. In 1854 when a cholera broke out, he began to gather information. He marked on a map where all the dead people had lived and he found that many people who had drunk the dirty water from the pump died. So he decided that the polluted water carried cholera. He suggested that the source of all water supplies be examined and the water companies were instructed not to expose people to polluted water any more. Finally, "King Cholera" was defeated.