课后习题答案

1、Unit 1 Great ScientistsPeriod One Warming Up and ReadingTeaching aims: Help students to get some information about some great scientists and their tremendous achievements; help the Ss to know the basic procedure of dong scientific research; reading for information and guessing the meaning of some ne

2、w words.Teaching procedure:Step 1 warming upT: look! Are you familiar with them?(Jane Goodall, Yuan Longping) Yes, they are great scientists we learnt last term. Do you know much about scientists? OK, lets check.1. Match the inventions with their inventors . 2.Find out who the scientists are accordi

3、ng to the information in the questions.Archimedes(阿基米德): Ancient Greek (287-212BC) mathematician Charles Darwin: the Origin of Species “father of modern biology”Thomas Newcomen: Gregor Mendel: Marie CurieThomas EdisonLeonardo da VinciSir Humphry Davy: Zhang Heng: Stephen Hawking: Step 2 Pre-readingT

4、: Today were going to another great scientist who made a contribution to infectious diseases1. an example of infectious disease: SARS2. Infectious diseases : They can be spread to other people. They have an unknown cause. They are difficult to cure. They need public health care to solve them.Step 3

5、Reading1. skimming: Who was the great scientist in the passage and what was the deadly disease of its day?2. About John Snow3. About cholera4. Careful reading for detailed information and dealing with the new words: Para 1: find the missing word Para 2&3: What were the two theories about the cause o

6、f cholera? Which did John Snow want to prove?What was his method of doing the research? Para 4: What did he do with the results of his enquiry?What valuable clue did he get about the cause of the disease?What might be the cause?Part of Snows Cholera MapPara 5:Why did he tell people to remove the han

7、dle from the pump?What happened after the handle was removed?Para 6&7:Where did the woman live and what did she had delivered to her house every day?What did their deaths suggest?What measures did John Snow take to prevent the disease from spreading?5. Listening and repeating6. Careful reading to Fi

8、nd the main idea of each paragraph:Step 4 Discussion1. Put the Stages in setting out a new scientific idea into the right order:Homework:2. Read the text and learn the new words by heart3. Find more information about cholera and John Snow on the Internet.Period Two Learning about language -discoveri

9、ng useful words and expressionsTeaching aims: Help the Ss to find the useful words and expressions from the text and practice using them in certain situations.Teaching procedure:Step1 Revisionl Ask questions on the text with the new words used in Ss answers. 1. What do you know about Dr. John Snows

10、being well-known in London2. From what disease did Londoners suffer in his age?3. Did people know how to cure the disease?4. What was the second theory explaining how the disease killed people?5. How serious was the disease outbreak in London?6. Where were many of the deaths in Broad Street?7. What

11、did Dr. Snow think was responsible for the disease?8. What did Dr. Snow advised the people in Broad Street do?9. What else did Dr. Snow find in another part of London that were linked to the Broad Street outbreak? 10. What conclusion did Dr. Snow tell the public? 11. What did Dr. Snow tell the water

12、 companies?l T write the new words and expressions on the black board:attend, exposeto, cure, absorb, severe, pump, blame, handle, linkto, announce, instructStep 2 Guessing gamel Ask Ss to give the word according the meaning given.1. someone who suffers when something bad happens(victim)2. a doctor(

13、physician)3. to examine and think about sth. carefully(analyse)4. to win a victory over sb.(defeat)5. sth. that tests strength, skill or ability(challenge)6. a question you ask to get information(enquiry)7. a machine for raising water(pump)8. to say or think that sb. or sth. is responsible for sth.(

14、blame)9. to take in(absorb)10. to connect sth. with sth. else(linkto)1. Guessing the meaning of the new words in each sentences.1. Did you attend the meeting yesterday?2. Their children attend the same school.3. The old woman has two nurses attending (on) her.4. Sorry I cant go with you, for I have

15、something important to attend to.5. Cotton gloves absorb sweat.6. Black cloth absorbs light.7. Clever children absorb knowledge easily.8. The boy was absorbed in the book and paid no attention to what was going on around him.9. Dont expose yourself to the sun for too long. Youll get sunburned.10. Ap

16、art from being fun and good exercise, swimming is a very useful skill.11. Many children are afraid of being blamed for failing the exam.12. The police blamed the traffic accident on his careless driving.13. We were ready to take the blame for what had happened.14. His parents are to blame for the sp

17、oiled child.15. You need to do some research and think carefully before you draw a conclusion.Step 3 Using languagel Complete the sentence according to the picture, using the new words learned in the text.1. Liu Xiang had a severe pain in his ankle so he pulled out of 110 hurdles, and now his mother

18、 is attending (on) him.2. The boy was absorbed in the book and paid no attention to what was going on around him.3. She smiled happily, exposing a set of amazingly white teeth.4. Apart from being fun and good exercise, swimming is a very useful skill.5. The taxi driver was to blame for the accident.

19、6. The new bridge links the city to the countryside.7. Follow the instructions when you take the medicine.8. Warm sunshine announces the coming of spring.l Complete the short passage using the new wordsEducated people in the twenty-first century may find it hard to believe that two hundred years ago

20、 people did not link illness to problems in the environment. We all know that in London drinking polluted water caused many deaths from cholera. There was a clue to its cause because it always started in the poor neighborhood. Then it spread to the richer areas as the servants passed it on. Many doc

21、tors suspected that polluted water was to blame and clean water was the cure. John Snows investigation proved that the dirtier the water, the more severe the illness. So the government and the doctors drew the conclusion that water must be purified. They instructed people to remove the handles form

22、pumps if the water was infected. Thus cholera was defeated in the end.Homework: write a passage using as many new words and expressions as possible.Period Three Learning about language -discovering useful structuresTeaching aims: Help Ss to understand past participle used as attribute and predicativ

23、e. Help Ss to use p.p to describe things or people feelings.Teaching procedure:Step 1 Find examples in the reading passage1. He thought about helping ordinary people exposed to cholera.2. Many thousands of terrified people died.3. and soon the affected person died.4. He found that it came from the r

24、iver polluted by the dirty water from London.5. He became inspired whenStep 2 Find the rulesl Complete the table with phases that have the same meaning.(SB Page 5)Rule1: the position of p.p used as attribute.l Complete the sentences using the p.p as the predicative.(SB Page 5)Rule2: p.p used as predicative to describe people feelingsl BrainstormLink verbs: get, look, sound, be, became, feel, prove, remain, keep, stay, seem, p.p used to describe peoples feelings: interested, excited, disappointed, bored, inspired, amused, moved, tired, s