深圳牛津英语七年级英语下册第四单元-第一课时.pdf

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1、Unit 4 Save the trees(第一课时）一、核心词汇 1.save v.拯救 2。pine n.松树 3.discuss v。讨论 4。branch n。树枝 5.root n。根 6.fight v.与作斗争 7。against v.反对 8.example n。例子 9.harmful adj。有害的 10。gas n。气体 11。produce v。产生 12。oxygen n。氧气 13。major adj.主要的 14.convenient adj。方便的 15。furniture n.家具 16.imagine v。想象 17。disease n.疾病 18.dig

2、v。挖 19。hole n。洞 20.carry v。搬 21.container n.容器 二、重点短语 1.fight against 对抗，与。.作斗争 2。help sb。do sth.帮助某人做某事 3。know about 知道，了解 4。in many ways 在很多方面，多角度 5。take in 吸收,理解 e from 来自（be from）7。for example 例如 8。in fact 事实上,确切地说 9。look around 环顾四周 10.（be)made of 由制成 11.millions of 大量的 12.(be)good for 对有好处 三、基

3、础知识点 1.If I plant this seed in the ground，will it become a pear tree，Hi?（1)if 引导条件状语从句时，意为“如果”。主句(包括祈使句和含有情态动词 can,may，must 等的句子）用一般现在时,从句也用一般现在时;主句用过去时，从句也用过去的某种时态;如果主句是一般将来时，从句要用一般现在时表示将来。Eg：We will go out if it is fine tomorrow。You must see a doctor if you are ill。(2)a 不定冠词，意为“一（个），用在以辅音音素开头的单数可数

4、名词前；在以元音音素开头的单数可数名词的前面要用不定冠词 an。不定冠词 a/an 常放在单数可数名词前，表示一个不确定的事物或人。其用法如下：第一次提到某人或某物时，用不定冠词。Eg:Youd better go to see a doctor。表示某一类中的任何一个,是泛指.Eg:A dog is a useful animal。表示“一的数量，但数的概念没有 one 强烈。Eg：I have a pen，a pencil and two books.用在表示时间、重量、速度、价格等名词前,意为“每一”.Eg：We have six English classes a week。2.Loo

5、k around this room.与 look 相关的短语：look for 寻找；look over 仔细检查,翻阅；look after 照顾；look up 抬头看 3.A lot of furniture is made of wood。很多家具都是由木头制成的。(be)made of(看得出原材料)=（be）made from(看不出原材料)意为“由.。制成”。如：The chair is made of wood。这把椅子是由木头制成的。Paper is usually made from wood.纸通常由木头制成.4.But we cut down millions of

6、trees every year.但每年我们都会砍伐数百万的树木。millions of 意为“数以百万计；大量的”。如:Millions of people around the world learn English。全世界无数人在学习英语。【拓展】：hundreds of 数以百计的，成千上万的；thousands of 数以千记的,成千上万的；tens of thousands of 数以万计的；hundreds of thousands of 数以十万记的 注意：hundred,thousand,million，billion 等前面有具体的数词时，其后不加s，也不带介词 of.Eg

7、：two hundred 200 5.She can skate at a very high speed because sh practises a lot。Practise 及物动词，意为“训练,练习”。宾语可以是名词、代词或动名词.Eg:You must practise speaking English every day。6.As a result，the number of kinds of animals，birds,insects and trees in the world is decreasing。The number of 意为“的数量.Eg:The number o

8、f the students in our class is 50.【拓展】The number of的数量 后接复数名词，但谓语动词要用单数形式 常跟 large，small 等词作表语 The number of the students in our school is 2000。A number of 大量；许多，相当于 many 接复数名词作主语时,谓语动词用复数形式 Number 前可加 small，large，huge 等表示程度 A number of students are playing football.7.。.but the speaker did not stop

9、speaking until twenty past twelve.Not.。.Until.。意为“直到才”。主句的动词一般是非延续性动词，它所表示的动作直到until 所表示的时间才发生。Eg:You cannot leave until your work is finished.知识练习：一、根据句意及首字母提示完成单词。1.Today，we are going to d_ the topic“Are dogs peoples friends?2.Look at the dog。It is hurt。Shall we s_.It？3.The b_ of the trees connect

10、 with each other and pass water and food underground。4.You mustnt park your car here。It is a_ the law。5.The workers are f_ against the decision to reduce their pay.6.I cannot i_ life without trees。7.Soft drinks are h_ to your health。8.The f_ in the room is quite old.二、选出可以替换划线部分的选项。1.We can produce

11、fresh water from the ocean now。A.get B.work C。make D.take 2.Life is more convenient than before。A.easier B.harder C。the easiest D.the hardest 3.Trees are important because they can take in harmful gases。A.make B.absorb C。stop D。put 4.You can do many things at home.For example,you can do some housewo

12、rk.A.For instance B。For more C。For ever D。For you 5.In fact,I didnt listen to our teacher carefully。A.Really B.Actually C.Exactly D。Certainly 三、单项选择 1.The doctor gave him some pills to _ the pain.A.take off B.take in C.take on D。take away 2。Do some sports every day.It will help you keep _。A.healthy

13、B.healthily C。kindly D。excitedly 3。There are _ people here in our city。-Actually,there are _ people here in our city。A.millions of;three million B.millions of；millions C.millions of；three million of D.million of;three million of 4.What time is it now？-It is 20:00。I think we should stop _ first.A.hav

14、ing supper B.have supper C。to have supper D。to having supper 5、-I bought _ furniture。Really？What _?A.a new；is it made of B.a new;does it made of C.a new piece of；is it made of D。a new piece of;does it made of 6、Look at this old bridge！It is made _ stones.A。from B.of C.into D.up 7、I _ the swimming cl

15、ub if you _ it。A.join；join B。will join；join C.join;will join D。will join；will join 8、He heard someone calling his name，so he stopped and _.But he couldnt see any one.A。looked around B。looked up C.looked into D。looked for 9、-We cant live without trees.They make our lives _。I agree。We should stop peop

16、le _ trees.A.convenient；to cut down B。conveniently；to cut down C。convenient;cutting down D.conveniently;cutting down 10、the little dog helps his owner _ many ways _ his daily life。A。in;at B.on;in C.in；in D。on;on 四、用所给单词的适当形式填空.1.Trees are important in our (day)lives?2.There are （many）people in this

17、hall than that one。3.We all know that smoking is (harm）to our health.4.Air is a mixture（混合物）of (gas）.5.Mr。Green lives in a （convenience）life.6.Tim has been a fire (fight)for five years。7.How does a fish （breath)under water？8.Many plants died because of the water (pollute）。五、完形填空 A Chinese man _1_ Ca

18、i Lun invented paper almost 2,000 years ago。He made paper _2_ wood.He then put all the paper together and made the paper _3_ a book。Now we still use wood to make paper。We use a lot of paper every day。If we keep on _4_ so much paper，there will not be any trees left on the earth.If _5_ no trees，there

19、will be no paper.Every day,people _6_ about 2，800 tons of paper。We use 17 trees to make one ton of paper。This means we are cutting nearly 48,000 trees every day.Since it _7_ more than 10 years for a tree to grow,we must start using _8_ paper now.So how can we save paper？We can use both sides of _9_

20、paper,especially when we are making notes.We can choose drinks in bottles instead of those in paper packets.We can also use cotton handkerchiefs（手帕）but not paper ones。When we go shopping,we can use fewer paper bags.If the shop assistant gives us a paper bag，we can save it and reuse it later.Everyone

21、 can help to save paper。If we all think carefully,we can help _10_ trees.But we should do it now，before it is too late。1.A。call B。calls C。called D.calling 2.A。from B。of C。into D.for 3。A。from B.of C.into D.for 4.A.waste B。to waste C.wasted D.wasting 5。A。there will be B.there are C.there was D。there w

22、asnt 6。A。take in B。put on C。throw away D.put away 7.A。spends B.takes C。costs D.pays 8.A。many B.few C。fewer D。less 9。A。a B。a piece C.one piece D.many 10.A。protect B.protects C.protecting D.to protecting 六、阅读理解 Can trees talk？Yes-but not in words.Scientists have reason to believe that trees do communi

23、cate with each other.Not long ago，researchers learned some surprising things.First a willow tree (柳树）attacked in the woods by caterpillars(毛毛虫）changed the chemistry of its leaves and made them tasteless so that the caterpillars got tired of the leaves and stopped eating them.The even more astonishin

24、g,the tree sent out a special vapor-a signal causing its neighbors to change the chemistry of their own leaves and make themselves taste also terrible,too.Talking，of course,doesnt need to be always in words。We can talk to each other by smiling,raising our shoulders and moving our hands。We know that

25、birds and animals use a whole vocabulary of songs,sounds and movements.Bees dance their signals,flying in certain patterns that tell other bees where to find nectar（花蜜)for honey。So shy shouldnt trees have ways of sending messages？1、From the passage，which kind of leaves dont caterpillars eat？A.leaves

26、 lying on the ground。B。leaves having an unpleasant taste。C.leaves bees dont like。D。leaves having an unfamiliar shape。2、The willow tree described in the passage protected itself by _。A.growing more branches B。talking with birds and bees.C.changing its leaf chemistry D。shaking caterpillars off 3、Accor

27、ding to the passage，the willow tree was able to talk with other trees by _.A.Waving its branches B。giving off a special smell C.dropping its leaves D.changing the colour of its trunk 4、According to the passage,bees talk by _。A.making special movements B。touching one another C。smelling one another D.

28、making unusual sounds 5、What does the author think about the idea that trees can talk？A。It is not true at all。B.Only a few people believe it。C.The scientists made some mistakes D.It seems very reasonable。七、用方框内所给单词完成对话 A：Tim,what are you 1 to do this Saturday?B：Im going 2 to trees with my friends。A：

29、Wow，thats cool.Why do you 3 plant trees?B：Because 4 trees are needed for our environment.A:Thats true。Can I 5 you?B:Of course.A.more B.plant C.join D.leave E.going F.want to 参考答案:一1.discuss 2。save 3。branch 4.against 5.fighting 6。imagine 7.harmful 8。furniture 二15 CABAB 三15 BAACC 610 BBACC 四1。daily 2。more 3。harmful 4.gases 5.convenient 6.fighter 7.breathe 8。pollution 五15 CACDB 6-10 CBDBA 六BCBAD 七EBFAC