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1、Unit 2 Saving the EarthTopic 2 All these problems are very serious.Section C(1)_ of us knows how to stop the bad behavior.(2)I knocked on the door but _ answered.(3)They are beautiful but I am looking for _ useful.(4)Is there _ you can do to help her?(5)Therere 5 000 people living here and almost _h
2、as his/her own car.(6)Hes cleverer than _ I know.(7)Ive looked _ but I cant find it.Fill in the blanks using something,anything,others,nobody,everyone,anybody,everywhere,none,other.NonenobodysomethinganythingeveryoneanybodyeverywhereIn our daily life,we should face more environmental problems.Can yo
3、u say something about them?oxygen a special kind of oxygen called“ozone”(O3)氧气氧气 a very big hole in the ozone layer,too much harmful radiation from the sun臭氧层放射，放射物 n.洞，坑v.出现，形成n.种类，形式In our daily life,we should face more environmental problems.Can you say something about them?CO2 carbon dioxide inc
4、rease a lot,form a“blanket”,the heat from the sun cant escape二氧化碳毛毯，毯子渗出；逃跑；逃脱 cause the level of the sea to rise called“the greenhouse effect”or“global warming”v.上升；起床；上升；起床；升起升起温室效应温室效应fewer treesfactory pollutiontraffic pollutionthe ozone layermore carbon dioxideCan you match them?1a Read and und
5、erstand.Look at the following pictures and predict the main idea of the passage.Choose suitable titles for Paragraphs 2-6.Then write it down in front of each paragraph.The earth is 4.6 billion years old.We humans have lived on the earth for only 35 000 years,but during this period,we have changed ou
6、r planet a lot in many ways.Some things weve done are very good for the earth while some are bad._ All over the world,people have cut down millions of trees.When it rains or when the wind blows,the earth is taken away.Forests have become deserts,so many kinds of animals and plants are disappearing.F
7、ewer TreesA.Traffic pollution B.Factory pollution C.Fewer trees D.The ozone hole E.More carbon dioxide _ In big cities,cars and buses have polluted the air.Now many people in cities have health problems._Factories have also polluted the land and the water.As a result,many rivers and lakes are now de
8、ad._ Around the earth,theres a special kind of oxygen called“ozone”(O3).It is important to the earth.But now air pollution is destroying it and making a very big hole in the ozone layer.Too much harmful radiation from the sun passes through the hole and reaches the earth directly.This is very danger
9、ous because this kind of radiation can cause cancer.Traffic PollutionFactory Pollution The Ozone Layer直接地直接地 _ Carbon dioxide(CO2)in the air has increased a lot.It mainly comes from burning oil,coal and wood.This has formed a blanket around the earth.The heat from the sun cant escape so the temperat
10、ure is rising.This is called“the greenhouse effect”.It causes the level of the oceans to rise and the climate of the earth to change.All these problems are very serious,so we must do something now.More Carbon Dioxide1b Read 1a and complete the following tasks.2.What does our planet mean here?A.The s
11、un.B.Mars.C.The moon.D.The earth.3.In the passage,blanket refers to _.A.carbon dioxide around the earth B.the ozone layer in the sky C.the forests around the world D.pollution all over the world4.The word it in Paragraph5 refers to _.A.CO2 B.O3 C.O2 D.H2O5.What is the best title for this passage?A.E
12、nvironment Problems B.Pollution on the Earth C.Hope for the Future D.The Greenhouse Effect ProblemEffect on the environmentfewer trees forests become deserts,animals and plants disappeartraffic pollution greenhouse effect,level of oceans rising,climate changeRetell it cars and buses pollute air,heal
13、th problemspollute land and water,rivers and lakes deadharmful radiation reaches the earth,cause cancer factory pollution ozone hole more CO2 As we all know,water pollution is becoming more and more serious.Some factories pour waste water into the rivers.As a result,it makes the water dirty and smell terrible.Most of fish in the water have died and we cant swim in the water.Water is very important to human beings,so we should do our best to protect and save it.Luckily,our government is taking measures to protect the water from pollution.You can write it like this: