4) Why is there no death at No. 20 and 21 Broad Street as well as at No. 8 and 9

Cambridge Street?

Task 2: Read and answer

1 Why couldn't the cholera be under control at first?

2 Which theory did John Snow believe in?

3 John Snow finally proved the theory he believed by ________.

A. gathering information with the help of a map

B. looking into the source of the water for Broad Street and Cambridge Street

C. Separating those who suffered cholera from those who didn't

D. Both A and B

4 To prevent the cholera from spreading again, what did John Snow do?

Task 3 Mind Map of the text

John Snow Defeats "King Cholera"

StepⅣ Careful reading:

Read the text carefully and fill in the chart (Ex 1, p3)

Scientific Report by John Snow

The problem

Nobody knew the cause of the serious disease of cholera

The cause

Idea 1: a strange cloud of gas found its victims

Idea 2: people absorbed the disease with meals

The method

Collect information from the cholera outbreak to prove which theory was correct

The results

He found the cause of cholera was the polluted water

Idea 1 or 2? Why?

Idea 2. Because the information showed that the dirty water carried cholera

The conclusion

He defeated cholera by examining the water supply and dealing with the polluted water

StepⅤ Discussion

Do you think John Snow would have solved this problem without the map? Give your reasons.

StepⅥ. Summary

Read the passage again and fill in the blanks:

John Snow was a well-known ______ in London in the ___ century. He wanted to find the ______ of cholera in order to ______ it. In 1854 when a cholera ______ out, he began to gather information. He ______ on a map where all the dead people had lived and he found that many people who had drunk the dirty water from the ______ died. So he decided that the polluted water carried cholera. He suggested that the _____ of all water supply be _______ and new methods of ________ with polluted water be found. Finally, "King Cholera" was defeated.

StepⅦ. Homework

1. Finish P4, Ex 1,2(on SB) Ex3 make sentences on exercise book (make one's way to, make up one's mind, make sure, make room for)

2. Find out the phrases according to the Chinese (part 1 on the paper for language points)

3. Retell the story John Snow Defeats "King Cholera" by following the 7 steps on p1

4. Read notes to Unit 1, p78-79, find out some difficult points while reading the text

Afterthoughts

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