课件25张PPT。Unit 4 Using LanguageCheck your homework(Workbook, page 64)Suggested answers to exercise 1:It was in 1996 that the first children’s conference on the environment was organized in Australia.
It is children that/ who run Millennium Kids.
It is on the Internet that you can find out more about Millennium Kids.
It is at the yearly conference that the young people decide which projects they want to concentrate on.
It is plastic bags that Millennium Kids is asking us to reduce, reuse and recycle. Check your homework(Workbook, page 64)Suggested answers to exercise 2:Indeed, it was four Australian children who started it in 1996 when they organized the first children’s environmental conference.
It is at this conference that we decide which projects we want to work on in the following year.
It was through one of these projects about five years ago that I first became involved in Millennium Kids.What can we do about Global warming?ReadingOuyang Guang and the editor of Earth Care.Skim the text and find out who are the writers of the letters.What’s the purpose of Ouyang Guang’s letter? To get some suggestions for what he can do about global warming.Read Ouyang’s letter and answer:What are Ouyang Guang’s two concerns? The first is that he feels that individual cannot have effect on huge environmental problems.
The second is that he is not sure where to start with his project.A. He is doing a project on global warming. B. He feels individuals can affect huge environmental problems. C. He isn’t sure where to start with his project. D. He wants to get some suggestions from Earth Care.Which is not the reason why Ouyang Guang writes the letter?bDoes Earth Care agree with Ouyang Guang’s opinion that individuals can have no effect? No, Earth Care doesn’t agree.Read Earth Care’s reply and answer:Which is not true according to the editor’s letter?Together, individuals can make a difference to environmental problems.
B. Individuals must put up with pollution.
C. Many activities individuals do can
produce carbon dioxide.
D. Individuals can save energy to slow down global warming.bLanguage points1. make a difference make a difference：有影响, 起(重要)作用
make some/ no difference to对...有些/没有关系That makes no difference to me.
那对我没有影响。
Exercise can make a great difference to your health.
锻炼对你的健康会产生很大的影响。2. put up with：忍受;忍耐;受苦That woman, as a housewife, has a lot to put up with.
作为家庭主妇,那女人得忍受很多烦恼。put aside 节省(钱、时间);储蓄;把……放在一边
put away 收拾起来;储存(钱);喝掉
put back 放回原处;拖延 put down 写下;记下;控制
put forward 提出(意见、建议);推荐
put off 延期;推迟 put on 假装;增加;上演(戏剧)
put out 熄灭;使忧虑;扑灭;出版
put up 举起;张开(伞);张贴;为……提供食宿 3. so long as / as long as：只要，如果As long as there is life there is hope.
留得生命在,不怕没希望.
You can go out, as / so long as you promise to be back before 11 o'clock.
你可以出去,只要你答应在11点以前回来.
I'll accept any job as / so long as I don't have to get up early.
只要不必早起,任何工作我都可以接受.
在用as / so long as连接的从句中,当其谓语为be,而主语和主句的主语相同时,则从句的主语和be可以省略。
I'm sure we are safe as long as (we are) in his care.
我深信只要在他的保护下,我们就会平安无事. Now in pairs make a poster for your school that tells students various ways they can reduce the amount of carbon dioxide in the air.Fight global warming
Cut down on energy. Cut down on carbon dioxide.
If not using an electrical item, turn it off.
If you suddenly feel cold, don’t turn the heat up, put on a jacket instead.
Walk or ride a bike and save fossil fuels.
Recycle paper, cardboard and newspapers.
Buy products made from recycled materials.
Buy energy – saving products like low energy light bulbs.
Plant trees to absorb CO2.
Tell your friends about global warming.
Every effort counts!Sample posterWrite a short passage to tell others how to solve the problem of global warming based on the suggestions you have collected. You can add more suggestions if you like. Make a presentation to the class.Group DiscussionWhat else should our government do to slow down global warming?Give money to green the surroundings and protect the forests.Make laws to protect rare plants and animals.Encourage people to find and use more renewable energy.1. We should stop depending on fossil fuels/'or our energy.
2. 90% of our energy comes from fossil fuels.
3. We can replace fossil fuels with cleaner sources of energy.
4. Nuclear power is a good source of energy.Listening
1. Listen to Part 1, and decide which statements Professor Keeling does NOT agree with.agreeagreedisagreedisagree2. Listen to Part 1 again and tick the energy sources that are mentioned. Complete the notes on them.produce carbon dioxide
Cheap and concentrated form of energyclean
Not practical: need huge areas of land to provide enough energy. clean
not very practical with present technologydoes not produce carbon dioxide
dangerousFirst we must try to find ways to use fossil fuels
that does not put carbon dioxide into the air.
Second we must produce products that are
economical with energy.
Third we must ask people to cut down on the
energy they use.3. Listen to Part 2 and then list three things we can do to save energy.4. Listen to Part 2 again and fill in the blanks.factoriesenergyproblemglobal developeddevelopingdevelopingdioxideblameSuggested answers:Homework Review the two letters and get more information about “What we can do about global warming”.
Preview reading passage on page 66.
