1、Unit 1 Great ScientistsTask I. Tell your partners what you know about cholera. You can refer to the information from the article below.What is Cholera?Cholera is a disease caused by Vibrio Cholerae, a form of bacteria that attacks the intestine (肠). The disease is not always serious, but 1 in 20 pat
2、ients suffer from severe diarrhea (腹泻), vomiting and muscle pains. Without treatment, such patients can die within a few hours if their bodies lose too much water.Task II. Here are some facts about cholera. Try to state them to your partners and consider whether they are the same as you expected.1.
3、Cholera can kill sufferers within a few hours if they are left untreated.2. About 100,000 120,000 people die of cholera every year and most of them are not reported to the WHO.3. 80% of cholera sufferers can be successfully treated using safe water and salt.4. Safe water and waste control can preven
4、t cholera.5. When there is an outbreak of cholera, it is important to focus on treatment and waste control.6. Safe and effective cholera vaccines are now used to control the disease. 7. Today, no country requires proof of cholera vaccination as a condition for entry.Task III. Read the text “John Sno
5、w Defeats King Cholera ”, and fill in the blanks.About John SnowHe was a famous 1. _ and Queen Victorias personal physician.He made up his mind to solve the problem of 2. _.Two theoriesTheory 1: Cholera was spread by 3. _.Theory 2: The disease went into peoples bodies through their 4. _.His suspicio
6、n He thought that the 5. _ theory was correct.What he did to prove his assumptionEvidence 1: He 6. _ the places on a map where the dead people lived and found the deaths were near the water pump in Broad Street.Evidence 2: He looked into the source of the water and found it came from a(n) 7. _ river
7、. When the water was cut off, the disease 8. _.Evidence 3: A woman, with 9. _, used the water from Broad Street pump and died.ConclusionPolluted water carried the 10. _.Task IV. Read the text and tell whether the following statements are true (T) or false (F).1. Many people died of cholera before it
8、s cause was found. ( )2. It was a fact that cholera spread in a cloud of gas. ( )3. When cholera broke out in 1854, it spread quickly through poor neighbourhoods. ( )4. The people who drank beer instead of water did not catch cholera. ( )5. The water companies were asked to stop supplying polluted w
9、ater to people. ( )Task V. Please read the text and match the stages of scientific research with what John Snow did to solve the problem of cholera.1. Find a problem.A. He marked the death places on a map and found out many deaths occurred near the water pump.2. Make a question.B. He wanted to face
10、the challenge of cholera and find the cause.3. Think of a method.C. He found that the water came from a polluted river and cholera was spread by germs.4. Collect results.D. He noticed two possible theories which explained how cholera spread.5. Analyse the results.E. He announced that polluted water
11、carried the virus and water companies stopped supplying polluted water.6. Find supporting evidence.F. He found that the family who used piped water from Broad Street died.7. Draw a conclusion.G. He thought the second idea was correct and decided to prove it.Task VI. Below is a summary of the text wi
12、th some words missing. Choose the words from the box and make the summary complete. Then try to retell the story to your partners.most, river, London, John Snow, companies, pump, water, sourcesNo one understood cholera and every time it came, thousands died. Queen Victorias doctor, 1. _, wanted to f
13、ind out how it was caused. When the disease came to 2. _ again in 1854, Snow noticed that 3. _ of the 500 people who died had drunk water from a water pump in Broad Street. He concluded that the 4. _ was to blame and found that the pumps water came from a dirty 5. _. After he stopped people from usi
14、ng the 6. _, people gradually stopped dying. Snow suggested all 7. _ of water be checked and water 8. _ take care not to supply people with dirty water. In this way, cholera was defeated. (By Ray Cama)Task VII. Suppose you are a reporter, and your partner is Mr. John Snow. Please make up at least 3
15、questions to interview him about how he tried to find the evidence to prove his theory. (Paragraphs 4-6) Keys:Task III. 1. doctor 2. cholera 3. air 4. meals 5. second 6. marked 7. polluted 8. slowed down 9. her daughter 10. virusTask IV. 1-5 TFTTTTask V. 1-B 2-D 3-G 4- A 5-C 6-F 7-ETask VI. 1. John Snow 2. London 3. most 4. water 5. river 6. pump 7. sources 8. companiesTask VII. 略