新概念英语第四册第1921课习题及答案.docx
《新概念英语第四册第1921课习题及答案.docx》由会员分享,可在线阅读,更多相关《新概念英语第四册第1921课习题及答案.docx(9页珍藏版)》请在冰豆网上搜索。
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】Unit19课后习题:
Multiplechoicequestions多项选择题
Choosethecorrectanswerstothefollowingquestions.
Comprehension理解
1Givingthebodyarest____.
a.seemstobethemainfunctionofsleep
b.doesn'tseemtobethemainfunctionofsleep
c.meansthatsleepmusthavesomefunction
d.preventsmuscleinactivity
2Electricalactivity____.
a.isagoodindicationofthewaythebodyrestsduringsleep
b.doesn'tseemtodiminishduringsleep
c.isaplausibleexplanationforthefunctionofsleep
d.mustalwaysberecordedduringsleep
3Rapideyemovementsareanindicationthat
a.apersonishavingadisturbedsleep
b.sleepisverydeep
c.thatasleeperisdreaming
d.thatapersonisdriftingintosleep
4Oneofthesestatementsistrue.Whichone?
a.Themostimportantfunctionofsleepisdreaming.
b.Rapideye-movementisassociatedwithdeepsleep.
c.Peoplewhoexperiencerapideye-movementsshowpersonalitydisorders.
d.Whenpeoplearewoken,theydon'treportanydreams.
Structure句型
5____havespeculationsgoneon?
____Forthousandsofyears.(11.2-3)
a.Howmany
b.Howoften
c.Howmuch
d.Howlong
6Thebodiestissuescanrepair____.
a.themselves
b.theirself
c.itself
d.them
7Peculiarburstsofeye-movements____anindividual'ssleep.(1.14)
a.punctuate
b.ispunctuating
c.arepunctuating
d.havepunctuated
8Peoplewokenduringtheseperiodsofeye-movementsgenerallyreportedthattheyhadbeendreaming____.(11.15-16)
a.forawhile
b.duringsleep
c.beforetheywenttosleep
d.justthismoment
Vocabulary词汇
9Speculationshavebeengoingonforthousandsofyears____.(11.2-3)
a.sotospeak
b.inhistory
c.andrecorded
d.infact
10Thismightbeaplausible____.(11.8-9)
a.conclusion
b.deduction
c.philosophy
d.theory
11Thesecondfactorismoreinterestingandmore____.(1.13)
a.obvious
b.basic
c.apparent
d.acceptable
12Someeye-movementswereslow,others____andrapid.(1.15)
a.smooth,quick
b.interrupted
c.sudden,irregular
d.painful,repeated
课后习题答案:
Unit19BBCADAABDDBC
【篇二】Unit20 课后习题及答案
Multiplechoicequestions多项选择题
Choosethecorrectanswerstothefollowingquestions.
Comprehension理解
1Oneofthesestatementsistrue.Whichone?
a.Snakesneedpoisontodigesttheirfood.
b.Snakescanfeedonotheranimalswithouttheuseofpoison.
c.Non-poisonoussnakesfindsurvivalmoredifficultthanpoisonousones.
d.Allsnakesarecapableofmanufacturingpoison.
2Thepossessionofpoisoninthesalivamakeshunting____.
a.easyforallcarnivores
b.atwo-edgedweaponwhencarnivoresfighteachother
c.almosteffortlessforsnakes
d.unpredictable,asNatureintended
3Thepoisonthatactsontheblood____.
a.actslessrapidlythannervepoison
b.doesn'taffectthevictimasbadlyasnervepoison
c.ismadebysnakeslikemambasandcobras
d.wasprobablythefirstofthetwokindsofpoisontobedeveloped
4Humanbeings____.
a.can'tcomparewithpreysuchasratsandmice
b.respondtoallsnakepoisonsinthesameway
c.arelikelytosurvivenervepoisonbutnotbloodpoison
d.arenottheintendedvictimsofsnakepoison
Structure句型
5They____havebeenabletocatchandliveonpreywithoutusingpoison.(1.3)
a.might
b.should
c.would
d.must
6Theycouldhavecaughtandlivedonpreywithout____poison.(1.3)
a.touse
b.use
c.theuseof
d.haveused
7For____snakes,poisonismerelyaluxury.(1.4)
a.these
b.a
c.-
d.an
8Bloodpoisonisthemoreunpleasant____.(1.15)
a.ofthemall
b.ofthetwo
c.intheworld
d.amongthemboth
Vocabulary词汇
9Salivaisanatural____.(11.1-2)
a.oilinthebody
b.snake-poison
c.digestiveprocess
d.bodyfluid
10Poisonwouldbe____toallcarnivores.(1.7)
a.anasset
b.ahelp
c.anecessity
d.adisadvantage
11Arsenicandstrychnine____usindifferentways.(1.11.11-12)
a.effect
b.result
c.affect
d.cause
12Thenervepoisonisthoughttobe____(11.15-16)
a.lesshighlydeveloped
b.morepotent
c.morerecent
d.lesscomplicated
课后习题答案:
Unit20BCADCCCBDBCA
【篇三】Unit21 课后习题及答案
Multiplechoicequestions多项选择题
Choosethecorrectanswerstothefollowingquestions.
Comprehension理解
1ThebasisofWesternfilms,asdefinedbyWilliamS.Hart,is____.
a.contrast
b.conflict
c.evil
d.outlaws
2WilliamS.Hart'sunderstandingoftheWestwas____.
a.absurdlyromanticized
b.influencedbyhiscontemporariesinHollywood
c.partofhistoryandmythology
d.basedondirectpersonalexperience
3ThebasicthemeofearlyWesternfilms____.
a.concernedsurvivalagainstIndians
b.wasabouttheclashbetweencivilizationandNature
c.wasnotappreciatedbyearlyaudiences
d.wasaboutinheritance
4Thepassagesuggeststhataudiences,pastandpresent,like____.
a.storiesaboutcivilization
b.simplelivingandsimplerules
c.impendingcatastrophe
d.warandbadbehaviour
Structure句型
5WilliamS.Hartappearedinnothing____Westerns.(11.1-2)
a.except
b.although
c.only
d.apart
6Hartdevisedtheprotagonist____heplayedineveryfilm.(1.3)
a.whom
b.which
c.what
d.where
7HartactuallyknewsomethingabouttheoldWest____hehadlivedasachild.(11.6-7)
a.towhom
b.which
c.init
d.inwhich
8____noperiodhasbeenmoreabsurdlyromanticized,mythandrealitydidjoinhandsinatleastonearena.(11.8-10)
a.As
b.Because
c.When
d.While
Vocabulary词汇
9Hartdevisedthe____heplayedineveryfilm.(11.2-3)
a.leadingpart
b.fighter
c.cowboy
d.firstperson
10Hisherowasrootedinthemythologyofafrontierthathad____.(11.7-8)
a.expanded
b.disappeared
c.becomeestablished
d.changed
11Thisperiodhasbeenromanticizedin____fashion.(11.8-9)
a.anexaggerated
b.arealistic
c.aridiculous
d.anamusing
12Menaccustomedtostrugglingforsurvivalwere____bypoliticians.(1.11)
a.confused
b.surrounded
c.pursued
d.welcomed
课后习题答案:
Unit21BDBBAADDABCA