单元4学案.doc

第四单元阅读和语言点学案
Fast reading
1.Who wrote the magazine article? What is the name of the magazine?
2.What are the names of the three scientists mentioned in the article?
What do they think about global warming? Do they agree with one another?
3.What do they think about global warming? Do they agree with one another?
4.What are the two graphs about?
5.What is the main topic of the article?
Read the sentences and tell true or false.
1.The temperature last century didn’t increase much.
2.Everyone believes that global warming is caused by the activities of humans.
3.Janice Foster believes that global warming is caused by burning fossil fuels.
4.Natural gas is a greenhouse gas.
5.Carbon dioxide is a byproduct of burning fossil fuels.
6.People accept Charles Keeling’s data because he took accurate measurements.
7.Flooding could be one of the effects of future global warming.
8.George Hambley believes scientists are just guessing about the effects of global warming.
9.George Hambley is worried about the effects of carbon dioxide on plant growth.
10.It is clear what the effects of global warming will be.
Detailed-Reading
1. Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977?
A. Dr. Janice Foster. B. Charles Keeling.
C. George Hambley. D. Sophie Armstrong.
2. "But there are some very different attitudes among scientists towards this issue.”
“issue" here means the same as the one in___ .
A. I bought the new stamp the day of its issue.
B. They are talking about one of the key issues in the election campaign.
C. The government is expected to issue a statement about the election.
D. The magazine has 12 issues each year.
3. The author probably agrees that ________
A. actually global warming is good for man.
B. we should do nothing about the global warming.
C. catastrophes will happen if the globe keeps on warming.
D. a lot remains to be found out about the effects of global warming.

4.Does Sophie Armstrong support a clear opinion?
5.Does George Hambley believe that we should worry much about the global warming?
6. How has the global warming come about?
7.What are the effects of global warming?
8. What is the purpose of the paragraph that is in bold?
9. What are the diagrams for?
10. What is the purpose of the last paragraph of the article?
11. What should we do about the terrible effects above?

The main idea of the passage:
Part 1(Paragraphs 1)
Part 2(Paragraphs 2-4)
Part 3(Paragraphs5-10)
Dr. Janice Foster
George Hambley
Carbon dioxide has caused the global temperature to __________. An increase of five degrees would be a ____________and could be ______________.
More carbon dioxide is a __________ thing,
which makes crops __________ and will encourage ____________________.
语言点预习
1. What do you think green house gases do?
2. So how has this come about and does it matter?
3. There is no doubt that the earth is becoming warmer ……
4. amount of
5. Without the ‘green house effect’
6. It was a scientist called Charles Keeling who ……
7. result in quantities of put up with
8. consequence tend
9. range oppose
build up on average above/below average
an average of ... ……的平均数
blame v. 埋怨,责备
10. even if /though

1. A large q______ of rice is badly needed here.
2. Students are from a wide r______ of backgrounds.
3. She studied hard, and in c____________ she passed the exam.
4. The park attracts 4 million visitors p___ year.
5. What sort of ______ (燃料) do these machines need?
6. The ______ (数据) is still being analysed. So don’t be so worried.
7. The earthquake was a terrible _____________ (大灾难).
8. A rainbow is a natural ___________ (现象) especially after a heavy rain.
10. The ______ (曲线图) of export indicates a new success of the company.

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