新概念英语第四册第1921课习题及答案.docx

1、新概念英语第四册第1921课习题及答案新概念英语第四册：第19-21课习题及答案 【篇一】Unit 19课后习题:Multiple choice questions 多项选择题Choose the correct answers to the following questions.Comprehension 理解1 Giving the body a rest _.a.seems to be the main function of sleepb.doesnt seem to be the main function of sleepc.means that sleep must have

2、some functiond.prevents muscle inactivity2 Electrical activity _.a.is a good indication of the way the body rests during sleepb.doesnt seem to diminish during sleepc.is a plausible explanation for the function of sleepd.must always be recorded during sleep3 Rapid eye movements are an indication that

3、a.a person is having a disturbed sleepb.sleep is very deepc.that a sleeper is dreamingd.that a person is drifting into sleep4 One of these statements is true.Which one?a.The most important function of sleep is dreaming.b.Rapid eye-movement is associated with deep sleep.c.People who experience rapid

4、eye-movements show personality disorders.d.When people are woken, they dont report any dreams.Structure 句型5 _ have speculations gone on? _ Forthousands of years.(11.2-3)a.How manyb.How oftenc.How muchd.How long6 The bodies tissues can repair _ .a.themselvesb.their selfc.itselfd.them7 Peculiar bursts

5、 of eye-movements _ an individuals sleep.(1.14)a.punctuateb.is punctuatingc.are punctuatingd.have punctuated8 People woken during these periods of eye-movements generally reported that they had beendreaming _.(11.15-16)a.for a whileb.during sleepc.before they went to sleepd.just this momentVocabular

6、y 词汇9 Speculations have been going on for thousands of years _.(11.2-3)a.so to speakb.in historyc.and recordedd.in fact10 This might be a plausible _.(11.8-9)a.conclusionb.deductionc.philosophyd.theory11 The second factor is more interesting and more _.(1.13)a.obviousb.basicc.apparentd.acceptable12

7、Some eye-movements were slow, others _ and rapid.(1.15)a.smooth, quickb.interruptedc.sudden, irregulard.painful, repeated 课后习题答案:Unit 19 BBCAD AABDD BC 【篇二】Unit 20课后习题及答案Multiple choice questions 多项选择题Choose the correct answers to the following questions.Comprehension 理解1 One of these statements is

8、true.Which one?a.Snakes need poison to digest their food.b.Snakes can feed on other animals without the use of poison.c.Non-poisonous snakes find survival more difficult than poisonous ones.d.All snakes are capable of manufacturing poison.2 The possession of poison in the saliva makes hunting _.a.ea

9、sy for all carnivoresb.a two-edged weapon when carnivores fight each otherc.almost effortless for snakesd.unpredictable, as Nature intended3 The poison that acts on the blood _.a.acts less rapidly than nerve poisonb.doesnt affect the victim as badly as nervepoisonc.is made by snakes like mambas and

10、cobrasd.was probably the first of the two kinds of poisonto be developed4 Human beings _.a.cant compare with prey such as rats and miceb.respond to all snake poisons in the same wayc.are likely to survive nerve poison but not blood poisond.are not the intended victims of snake poisonStructure 句型5 Th

11、ey _ have been able to catch and live on prey without using poison.(1.3)a.mightb.shouldc.wouldd.must6 They could have caught and lived on prey without _ poison.(1.3)a.to useb.usec.the use ofd.have used7 For _ snakes, poison is merely a luxury.(1.4)a.theseb.ac.-d.an8 Blood poison is the more unpleasa

12、nt _.(1.15)a.of them allb.of the twoc.in the worldd.among them bothVocabulary 词汇9 Saliva is a natural _.(11.1-2)a.oil in the bodyb.snake-poisonc.digestive processd.body fluid10 Poison would be _ to all carnivores.(1.7)a.an assetb.a helpc.a necessityd.a disadvantage11 Arsenic and strychnine _ us in d

13、ifferent ways.(1.11.11-12)a.effectb.resultc.affectd.cause12 The nerve poison is thought to be _(11.15-16)a.less highly developedb.more potentc.more recentd.less complicated 课后习题答案:Unit 20 BCADC CCBDB CA 【篇三】Unit 21课后习题及答案Multiple choice questions 多项选择题Choose the correct answers to the following ques

14、tions.Comprehension 理解1 The basis of Western films, as defined by William S.Hart, is _.a.contrastb.conflictc.evild.outlaws2 William S.Harts understanding of the West was _.a.absurdly romanticizedb.influenced by his contemporaries in Hollywoodc.part of history and mythologyd.based on direct personal

15、experience3 The basic theme of early Western films _.a.concerned survival against Indiansb.was about the clash between civilization and Naturec.was not appreciated by early audiencesd.was about inheritance4 The passage suggests that audiences, past and present, like _.a.stories about civilizationb.s

16、imple living and simple rulesc.impending catastrophed.war and bad behaviourStructure 句型5 William S.Hart appeared in nothing _Westerns.(11.1-2)a.exceptb.althoughc.onlyd.apart6 Hart devised the protagonist _ he played inevery film.(1.3)a.whomb.whichc.whatd.where7 Hart actually knew something about the

17、 old West _ he had lived as a child.(11.6-7)a.to whomb.whichc.in itd.in which8 _ no period has been more absurdly romanticized, myth and reality did join hands in atleast one arena.(11.8-10)a.Asb.Becausec.Whend.WhileVocabulary 词汇9 Hart devised the _ he played in every film.(11.2-3)a.leading partb.fi

18、ghterc.cowboyd.first person10 His hero was rooted in the mythology of a frontier that had _.(11.7-8)a.expandedb.disappearedc.become establishedd.changed11 This period has been romanticized in _ fashion.(11.8-9)a.an exaggeratedb.a realisticc.a ridiculousd.an amusing12 Men accustomed to struggling for survival were _ by politicians.(1.11)a.confusedb.surroundedc.pursuedd.welcomed 课后习题答案:Unit 21 BDBBA ADDAB CA