高中英语Unit 22 Lesson 3 Natural Disasters 课件2北师大版选修8 课件.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Lesson 3,Unnatural Disasters,Exercise 1,which of the disasters in the key words do you think are,:,(a)caused by people?,(b)made worse by people?,(c)natural?,Key words:,disasters,droughts,earthquakes,floods,Forest fires,hurricanes.,Landslides,tsunami,typhoon,Volcanic eruptions,windstorms,Exercise 2,Read the article and check your answers to exercise 1.,reading strategies:completing Texts with sentence gaps,(a)read the text to get the general idea.,(b)read a paragraph with asentence gap and identify,the topic,e.g.disasters.,(c)read the sentences before and after the gap and look,for clues about the missing setence,e.g.is it an,example of what is mentioned before?,(d)certain words may help you:time references(then).,pronoun references(it,that),linking words(however),(e)decide which sentence goes in the gap.check that it,fits the sentences before and after it.,ANSWERS:,Caused by people:forest fires,Made worse by people:hurricanes,Natural:floods,droughts,windstorms,earthquakes,volcanic eruptions,forest fires,hurricanes,Exercise 3,Use the strategies to complete the gaps in the text(1-5)with these,Sentences(a-g).There are two extra sentences you do not need.,But geological evidence shows that 73.000years ago there,was a much greater eruption.,(b)Even prosperous europe has suffered and large areas of,france,britain and germany have all been under waer.,(c)That is probably not the most important factor either.,(d)third,the other bits of land you might have been able to,farm are now useless.,(e)On top of all that,add climate change and the spectre of,global warming.,(f)For example,the yellow river,once notorious for tlooding,the chinese landscape,failed to reach the sea at all on 226,days in 1997,(g)One answer is over-population.,(1),(2),(3),(4),(5),Exercise 4,Read the text again and answer these questions.,What is the attitude of the journalist towards the future?,Who are most likely to be the victims of natural disasters?,Why are there now more hurricanes,floods and droughts?,Why are volcanoes and earthquakes more dangerous now?What could be the biggest threat to the planet in the future?,What effects might this threat have?,Answers,1.Pessimistic,2.Poor people,3.Overpopulation and mismanagerment of the worlds resources,4.Because half the worlds population lives in cities within range of,volcanic eruptions and earthquakes,5.A volcanic eruption,6.It might plunge the planet into winter for years.,Exercise 5,Look at the words form the text(1-10)and the other examples,In brackets,match the prefixes with the meanings(a-j).,overpopulation(overgrown,oversleep),Substandard(subway,submarine),deforestation(defuse,dehydration),downhill(downstream,downgrade),undernourished(underpaid,undercooked),rebuild(replace,rewind),Unstable(unusual,uncommon),Semi-active(semi-circle,semi-final),Multinational(multi-purpose,multi-racial),Mismanagement(misunderstand,misplace),Again (f)opposite of an action,Wrongs (g)not enough,Below (g)downwards,Too much (i)opposite of an adjective,Many (j)partly/half,Answers:,1.d),2.c),3.f),4.h),5.g),6.a),7.i),8.j),9.e),10.b),Exercise 6,Complete the sentences with words form exercise 5 in a suitable form,.,After the storm they had to,hundreds of houses which had,been damaged.,(2)Many people in the developing world suffer from diseases because,they are,of the competition.,(3)Our team was knocked out in the,of the competition.,(4)The bomb was about to go off but the experts managed to,it.,(5)I,the question and failed the exam.,(6)I,yesterday and arrived an hour late for class.,(7)A lot of houses collapsed in the erathquake,because of,construction.,(8)Floods are not,these days;they happen,more and more often.,Answers:,Rebuild 2.undernourished 3.semi-final,4.Defuse 5.misunderstood 6.overslept,7.sub-standard 8.unusual,Exercise 7,Work in pairs.Discuss these questions.,What natural disasters have happened in the last few months?,What do you think governments can do to help prevent natural,disasters?,(3)What organisations do you know that provide environment?,(4)What can we do as individuals to improve the environment and,help victims of natural disasters?,Natural disasters,Homework,Exercise 2 in page 56,GOODBYE,