2.Scanning

　 Read the text again and match the short summaries with each paragraph according to the text.

　Para. 1 A. Plot information on a map to find out where people died or didn't die.

Para. 2 B. Find out where they got their water. Analyze the water to see if it is the cause of the deaths.

　Para. 3 C. Which theory is correct?

　Para. 4 D. Collect data on those who fell ill or died and where they lived.

　Para. 5 E. What causes cholera?

　Para. 6 F. It was certain that polluted water carried the disease.

　Para. 7 G. Find other evidence to support the analysis

3. Careful Reading

　　1．According to John Snow's view，--．

　 A．Queen Victoria suffered a lot from bad health

　 B．a cure had been found for cholera before his time

　 C．cholera's cause had to be discovered in order to control it

　 D．thousands of terrified people knew what they should do

　 2．Which of the following theories did John Snow believe in?

　 A．A cloud of dangerous gas would float around until it found its victims．

　 B．People absorbed cholera into their bodies with their meals．

　 C．People got infected with cholera because of cold and hunger．

　 D．People suffered from cholera because they were not clean．

　 3．Before 1854，when cholera broke out，--．

　 A．many thousands of people died B．people with cholera could be cured

　 C．John Snow began to know its cause D．John Snow became inspired

　 4．How did he find out the cause of the disease?

　 A．By living in the area where cholera broke out．

　 B．By marking a map where all the dead people had lived．

C．By telling the terrified people how to prevent it．