泛读第四册课后练习答案未讲解的17课rv.docx

泛读第四册课后练习答案未讲解的17课rv.docx

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泛读第四册课后练习答案未讲解的17课rv

泛读第四册未讲解17课课后练习及答案

Lesson1

Exercises

1.ReadingComprehension

Readthetextagainandchoosethebestanswertoeachofthefollowingquestionsorstatements.

1）Accordingtotheauthor,whatkindofpeopleweretheWrightbrothers?

A.reckless

B.vain

C.practical

D.diffident

2）ItcanbeinferredfromthetextthatwhentheWrightbrothersbegantodoflyingexperiments,people_______.

A.hadhighexpectations

B.didn’twanttoseethemsucceed

C.hadstrongdoubtsabouttheirsuccess

D.gavethemlotsofsupport

3）TheWrightbrotherspassedoutoftheheadlinesbecauseof________.

A.theoutbreakoftheWorldWarI

B.Wilbur’sdeath

C.moreandmorepioneersinflying

D.alloftheabove

4）DosPassos’sattitudetowardstheWrightbrothersis_________.

A.suspicious

B.appreciative

C.critical

D.jeering

Key:

1）C其他三项语义不符合2）C文章中提及人们嘲笑他们设计的飞机3）D文章提及了上

面三个因素使莱特兄弟淡出了人们的视线4）B其他三项语义不符合

2.VocabularyStudy

Readthefollowinggroupsofwordscarefully,findouttheirdifferencesandthendothe

1

followingexercises.

1）hover,soar

SamplesfromtheText

A.⋯afiftycentmechanicaltoymadeoftwofansworkedbyelasticbandsthatwas

supposedtohoverintheair,⋯-（Ll65）.63

B.⋯occasionallyeagles,thattheWrightbrothersfollowedsoaringwiththeireyesasLeonardowatchedthemcenturiesbeforestraininghissharpeyestoapprehendthelawsofflight.（Ll.94-98）

C.Oncethey’dmanagedhovertoforafewsecondsandsoareversoslightlyonarisingair-currenttheydecidedthetimehadcometoputamotorintheirbiplane.（Ll.112-115）

Fillineachblankwithawordinitsproperform.

A.Ifthebirdshavenotflownforthreeyears,theywill______intotheclouds.Iftheyhave

notsungforthreeyears,theirsongswilltakeeveryonebysurprise.

B.Thehelicopter______overthecrowdforawhilebeforeinchingaway.

C.Onecanneverconsenttocreepwhenonefeelsanimpulseto______.

D.Itfollowsthattheymusteitherarriveattheoppositeviewor______betweenthetwo.

E.Theycanflyforward,backward,upsidedownandeven______inmid-air.

F.AttimesSqueakwould______aroundmyhead,justlookingatmefornoapparentreason.

G.Hisgraceandwitduringthedangerousincidentcausedhispopularityto______.

H.Someofustugattherulessohardthatwenever_____toreachtheheightswemight

haveobtained.

2）involved,engagedSamplesfromtheText

A.⋯tryingtointerestgovernmentofficials,tomakesenseoutofthesmoothinvolvedheartbreakingremarksoflawyers.（Ll.127-128）

B.AstheflightsgotlongertheWrightbrothergotbackers,engagedinlawsuits,⋯（Ll.-140）38

Fillineachblankwithawordinitsproperform.

2

A.ShecalledMrs.Watt,butthelinewas______.

B.Weshouldholdyouresponsibleforanylossthatmaybe______.

C.Thesoldierswere______inhand-to-handcombatwiththeenemy.

D.Thesuccessoftheprojectreliesonthecooperationofalltheparties______.

E.HowlonghasAlicebeen_______withthatred-hairedboy?

F.Wearenow_______inagreatandmostgloriouscause,neverundertakenbyour

forefathers.

G.Itisconsideredthatbioclimatologyisan_______subject.

H.Fathersareencouragedtobemore_______withtheirfamilies.

I.Whenshesaidshewas______tobemarriedInearlyfelloffmychair.

J.Heisbelievedtohavebeen______inthekidnappingofjournalistJillCarroll.

KeytoVocabularyStudy

1）a.soarb.hoveredc.soard.hover

e.hoverf.hoverg.soarh.soar

（hovermeans1）stayintheairinoneplace;2）stayaroundoneplace;3）stayclosetocertainamount.soarmeans1）goupwardfast;2）beveryhigh;3）gothroughtheair.）

2）a.engagedb.involvedc.engaged/involvedd.involved

e.involvedf.engaged/involvedg.involvedh.involved

i.engagedj.involved

（engagedmeans1）busy;2）havingagreedtomarry;3）doingoractivelyinvolvedinanactivity.involvedmeans1）takingpartinanactivityorconnectedwithitinsomeway;2）havingaromanticrelationshipwithsomeone;3）spendingtimewithsomeone;4）complicated.）

Lesson3

1.ReadingComprehension

Readthetextagainandchoosethebestanswertoeachofthefollowingquestions.

1）Whatistrueaboutprescribedburning?

A.Itcanonlybedoneundercertainweatherconditions.

B.Itreferstoanaturalfirewhichiscontrolledbyforesters.

C.Ithasbeenpracticedforoveracentury.

D.IthasgainedwideacceptanceaftertheYellowstonefires.

2）Whichofthefollowingcannotexplainwhypeopledoprescribedburning?

A.Fireispartoftheecosystemofforests,asimportantassunshineandrain.

B.Aforestthathasgoneunburnedformanyyearsismorelikelytogoupinflames.

C.Frequentsmallfiresstayinglowcanpassthroughtheforestfloorquickly.

3

D.Prescribedfirescanreducecarbondioxideintheforests.

3）Whichofthefollowingdoesnotincreasetheprobabilityofabigforestfire?

A.globalwarming

B.grassyclearings

C.heavygrowthofunderbrush

D.yearsofaccumulatingleaves

4）Whichofthefollowingisnotthenecessaryconditionfordoingprescribedburning?

A.breeze

B.steadyfire

C.dryweather

D.naturalfirebreak

5）Theauthorwritesthispassageinorderto_______.

A.explainwhatareprescribedfires

B.showtheneedforprescribedfires

C.tellhowtostampoutwildfires

D.showthedevastatingconsequencesofwildfires

Key:

1.A文中明确提到计划烧除需要的天气条件2.D文中没有说到计划烧除可以减少森

林中的二氧化碳3.B其他三项都提及，而B选项没有提及4.A没有提及A项

5.B虽然其他三项略有提及，但是此文的初衷是表明实行计划烧除的必要性

2.VocabularyStudy

Studythefollowinggroupsofwordscarefullyandfillineachblankwithawordinitsproperfrom.

1）fire,flame,blaze

A.Hecouldseethe_______ofthecamp-fireacrossthebeach.

B.Actually,theywerepouringoilonthe______andmakingmattersworse.

C.The______ofthesunlightonthewaterwasbreath-taking.

D.Theaircraftcamedownin_______,andheatfusedmostofthepartstogetherintoasolidmass.

E.Thefireburnedslowlyatfirst,butsoonburstintoa_______.

F.Frequently,onlyheavyrainwillprovidetheamountofwaternecessarytoextinguishthe_______.

G.Fivefireenginesbroughtthe______undercontrolinjustoveranhour.

H.Therecentoutbreakofaseriesoffatal______hascauseddeaths,injuriesandlossofproperties

toourcommunityandexposedfirehazardsinageingmulti-storeybuildings.

I.Thecrewmadealastefforttoputoutthe_____beforefinallyabandoningtheship.

2）ignite,light,kindle

A.Inamoderncoalburningelectricgeneratingplantthesteammaybehotenoughto_______

wood.

4

B.Heclaimedhehadgivenupsmoking,butlaterhe_____acigarettebeforemyveryeyes.

C.Whencamping,youcan______afirewithdryleavesandsmallpiecesofwood.

D.It_______moreeasilythananyothercommongasandahighpressureleakcaneven_______

spontaneously.

E.Theelectriclampswentoutsowehadtoresorttocandlesto______theroom.

F.Asfaraswecandiscern,thesolepurposeofhumanexistenceisto_____alightinthedarkness

ofmerebeing.

G.Flames______upthenightskyinawarehousenearMelbourne,Australia.

H.Organizeyourdaytoavoidanysetbacksthatmight______temperflare-ups.

I.Dreams_______aflametoilluminateourdarkroads.

Keyto2.VocabularyStudy

1）A.blaze/flames

B.fire/flames

C.blaze

D.flames

E.blaze

F.flames/fire

G.fire/flames/blaze

H.blazes/fires

I.blaze/fire/flames

（fireisamostgeneralterm,meaningtheeventofsomethingburning,oftendestructiveand

producingheat,light

andsometimessmoke.flamereferstohotbrightburninggasthatyou

seewhensomethingisonfireanditisoftenusedinitspluralform.blazemeansastrongfire

thatburnsbrightlyorverybrightlightorcolor.）

2）A.ignite/kindle/light

B.lit

C.ignite/kindle/light

D.ignites/kindles,ignite/kindle

E.light

F.kindle

G.lit

H.ignite

I.kindle

（Allthethreewords

ignite,kindle,andlightcanbeusedtomean1）startburning;2）make

somethingstartburning.Butigniteemphasizesthereachingoftheburningpoint,kindleemphasizesthepreparationbeforemakingsomethingburn,andlightemphasizesthegivingoffoflightandheat.Besides,ignitealsotakesonthesenseofstartingsomethingdangerous,kindlealsomeansmakesomeoneexcitedaboutsomething,andlightalsohasthemeaningofprovidinglightforaplace.）

3.GrammarStudy

Fillineachbracketwiththeproperformofthewordbeforeitanddecideonitspartofspeech.

1）

Bystartingtheirowncarefullycontrol（

）blazes—apracticecall（

）

prescribe（

）burning—theyhopetoputanendtomonsterwildfires,liketheone

thatravaged500,000Floridaacreslastsummer.（Ll.10-13）

2）

In1998theEarth

’saveragesurfacetemperaturewasthehottesteverrecord（

）,

accordingtotheWorldMeteorologicalOrganization.（Ll.21-23）

3）

Theyalsobelieveinlettingfiresspark（

）bylightningburnnaturallywhencool,

dampweatherreducestheriskofrunawayflames.（Ll.29-31）

4）

BeforetheForestServiceinterfered,scatter（

）groundfiresignite（

）by

lightningclearedtheforestfloorofaccumulatingleaves,branches,andneedlesevery5to25

years.（Ll.50-52）

5）

Yearsofamass（_______）underbrushlight（_________）bylightningorcarelesslytend

5

（_______）campfirescanfuelamuchhotter,faster-movingfirethanwouldnaturallyoccur.（L.

66-68）

Keyto3.GrammarStudy

1）Bystartingtheirowncarefullycontrolled（adj.）blazes—apracticecalled（pastparticiple）prescribed（adj.）burning—theyhopetoputanendtomonsterwildfires,liketheonethatravaged500,