【文档说明】必修二unit2 listening and speaking 课后练.doc，共(7)页，39.000 KB，由小赞的店铺上传

转载请保留链接：https://www.doc5u.com/view-573aa3136d685a154c51933abdf9576d.html

以下为本文档部分文字说明：

必修二unit2listeningandspeaking课后练PartI基础部分一、单词拼写1、Theheartattacksmaydirectly________(危害)people'slives.2、Icanseesome________(猎

人)comingtowardsus.3、SorryI'mlate.Imighthaveturnedoffthe________(闹钟)clockandgonebacktosleepagain.4、Lastyearthenumberofstudentswhograduat

edwithadrivinglicensereached200,000,an________(平均数)of40,000peryear.5、Itisreportedthatrapideconomicdevelopmentth

reatensanimal________(栖息地).6、Whenyougetthere,youcanseethereare________(海报)advertisingthenewmoviethroughoutthetown.7、T

he________(物种)areindangerofdisappearingintheworld.8、We'lltakeaction________(立刻)tohelphimoutoftrouble.9、Whathehasdonerecentlyis

________(非法的).10、Thismass________(灭绝)iscausedbyhunting,habitatlossandpollution.二、用所给单词的适当形式填空1、Theresearchpaperpublishedisprimarily_____(concern)wit

hfactorsaffectingemployeeperformance.2、Heslowedthebleedingbyapplying_____(press)tothewoundsuntilthepol

iceandambulancearrived.3、Astheeconomydevelops,the_____(live)conditionsofthepeoplehavebeenimprovedaccordingly.4、Wesincerelyhopetheyca

nplayakeyroleinprotectingthe_____(endanger)speciesbeingharmed.5、Thegovernmenthastakenaseriesofmeasurestoprotectwildanimalsfrom_____(ex

tinct).6、Educationhasbeengivenahigh-priority_____(rate)bythenewadministration.7、Wemustfindawaytoresolvetheseproblems_____itistoolate.8、Manypeopl

etraveltothecountryontouristvisas,andthenstayandworkthere_____(illegal).9、Branaghwontwoawardsforhisscreen________

___(adapt)ofShakespeare'sHenrytheFifth.10、Thesuppliesweretransportedtothelocalpeople_____(immediate)theearthquakehappened.三、完成句子1、我们应该学会和自然和睦相处。Wesh

ouldlearnto________________________nature.2、我祝贺你英语取得如此大的进步。Icongratulateyouonyour________________________inEnglish.3、我很欣赏那些运动员在压力之下表现出的优雅。Iappreciat

etheathleteswhoshowgrace____________.4、Wemust_______________(采取必要的措施)topreventtheriversfrombeingpolluted.5、Wildanimal

s______________(正在被猎杀)andtheirhabitatsaregettingsmallerandsmaller.四、选词填空用方框内所给短语的适当形式完成下面的句子adaptto,di

eout,indanger,makeprogress,makeout,onaverage,remind...of,watchover1.Seeingthefilm,everyonewhowaswatchingit___

____hisownchildhood.2._______,menstillearnmorethanwomen.3.I'mgladthatyou_______inEnglishinthelasttwomonths.4.Thepoliceme

nbelievethattheirlivesare_______,sotheyarerushingtotheirrescue.5.Iheardthevoices,butcouldn't_______whattheyweresaying.6.Thewildpopulationofkoalasis

facedwith_______.7.Theguardswereoriginallyhiredto_______thehousesastheywerebeingbuilt.8.Theworldwillbedifferen

t,andwewillhavetobepreparedto_______thechanges.PartII提高部分一、阅读理解Howdoesanecosystem(生态系统)work?Whatmakesthepopulationsofdifferentspeciesthewaythey

are?Whyaretheresomanyfliesandsofewwolves?Tofindananswer,scientistshavebuiltmathematicalmodelsoffoodwebs,notingwhoeatswhomandhowmucheacho

neeats.Withsuchmodels,scientistshavefoundoutsomekeyprinciplesoperatinginfoodwebs.Mostfoodwebs,forinstance,consistofman

yweaklinksratherthanafewstrongones.Whenapredator(掠食动物)alwayseatshugenumbersofasingleprey(猎物),thetwospeciesarestronglylinked;whenapredatorliveson

variousspecies,theyareweaklylinked.Foodwebsmaybedominatedbymanyweaklinksbecausethatarrangementismorestableoverthelongterm.Ifapredator

caneatseveralspecies,itcansurvivetheextinctionofoneofthem.Andifapredatorcanmoveontoanotherspeciesthatiseasiertofindwhenapreysp

eciesbecomesrare,theswitchallowstheoriginalpreytorecover.Theweaklinksmaythuskeepspeciesfromdrivingoneanothertoextinction.Mathematicalm

odelshavealsorevealedthatfoodwebsmaybeunstable,wheresmallchangesoftoppredatorscanleadtobigeffectsthroughoutentireecosystems.Inthe1960s,scie

ntistsproposedthatpredatorsatthetopofafoodwebhadasurprisingamountofcontroloverthesizeofpopulationsof

otherspecies—includingspeciestheydidnotdirectlyattack.Andunplannedhumanactivitieshaveprovedtheideaoftop-downcontrolbytoppredatorstobetr

ue.Intheocean,wefishedfortoppredatorssuchascodonanindustrialscale,whileonland,wekilledofflargepredatorssuchaswolves

.Theseactionshavegreatlyaffectedtheecologicalbalance.Scientistshavebuiltanearly-warningsystembasedonmathemat

icalmodels.Ideally,thesystemwouldtelluswhentoadapthumanactivitiesthatarepushinganecosystemtowardabreakdownorwouldevenallowustopullanecosystemb

ackfromtheborderline.Preventioniskey,scientistssaybecauseonceecosystemspasstheirtippingpoint(临界点),itisremarkablydifficultforthemtoreturn.1

.Whathavescientistsdiscoveredwiththehelpofmathematicalmodelsoffoodwebs?A.Thelivinghabitsofspeciesinfoodwebs.B.Therulesgoverningfoodwebsoftheecosyst

ems.C.Theapproachestostudyingthespeciesintheecosystems.D.Thedifferencesbetweenweakandstronglinksinfoodwebs.2.Astronglinkisf

oundbetweentwospecieswhenapredator________.A.hasawidefoodchoiceB.caneasilyfindnewpreyC.stickstoonepreyspeciesD.canquicklymovetoanotherp

lace3.Whatwillhappenifthepopulationsoftoppredatorsinafoodwebgreatlydecline?A.Thepreyspeciestheydirectlyattackwilldieout.B.Thespeciesthey

indirectlyattackwillturnintotoppredators.C.Thelivingenvironmentofotherspecieswillremainunchanged.D.Thepopulationsofotherspecies

willexperienceunexpectedchanges.4.Howdoesanearly-warningsystemhelpusmaintaintheecologicalbalance?A.Bygettingillegalpracticesundercon

trol.B.Bystoppingusfromkillinglargepredators.C.Bybringingthebroken-downecosystemsbacktonormal.D.Bysignalingtheurgentneedfortakingpreventiveac

tion.二、完形填空EarlyspringcanbeatoughtimeintheMidwest.Itcan1bothpeopleandanimalswithitsunexpectedsnowstorms.Everyspring,m

igratory(迁徙的)birdscampoutinalargepondnearmyhouseonthewaytotheirsummer2.Thisyear,besidesgeese,scaups,atypeofd

ivingduckspentdayshangingout3eats.Thenasnowstormhit,followedbyavery4night.Thenextmorning,Iwasshockedtoseethatallb

irdshad5overnight—exceptonelonefemale,whowasdiving6anddynamicallyinthecircleofopenwater.Hermovementandbodyheathadkeptthe

7fromcomingcloseasI8herfrommywarmhouse.However,asthetemperaturedropped,theopenwatergotsmaller,andhermovementsslowed.Iwatchedwit

h9assheeventuallystoppedmoving,fearingthatsomethingmighthappen.Andthenithappened:Twomoreducksappeared,10nexttoherstillbody.Moreduckscameandthecircleo

fwatercamealivewiththeirsplashinganddiving.Slowly,thecircleofwater11insize.Withinminutes,thelonefemalewasreviv

edbyherfriends’presence.Thislittleduckwouldn’thave12anothernightwithoutherfriends.She,inturn,hadkeptthatareaofwater13,soherfriendsh

adaplacetostopand14themselves.Sometimes,atinyaction—evenourmere15—mightbrightenone’sday,andevensaveone’slife

.1、A.scareB.moveC.surpriseD.beat2、A.campB.vacationsC.coursesD.habitat3、A.regardlessofB.insearchofC.inadditiontoD.asfor4、A.darkB.starryC.peace

fulD.freezing5、A.gatheredB.disappearedC.panickedD.fainted6、A.energeticallyB.patientlyC.calmlyD.cautiously7、A.iceB.houseC.snowstormD.

water8、A.tendedB.followedC.watchedD.recorded9、A.reliefB.doubtC.anxietyD.pleasure10、A.rowingB.landingC.circ

lingD.feeding11、A.increasedB.decreasedC.transformedD.formed12、A.sparedB.wastedC.spentD.lasted13、A.stillB.openC.cleanD.steady14

、A.motivateB.remindC.judgeD.refresh15、A.presenceB.appreciationC.attitudeD.request三、语法填空Aprettygirlhadalwaysloo

kedforwardto1._______(help)endangeredspeciesofwildlife.Onedayaflyingcarpettookhertoa2._______(distance)landinTibetwhereshesawanantel

opelookingsad.Ittoldherthattheywerebeingkilledforthewoolbeneaththeirstomachs.Asaresult,theyarenowan3._______(endanger)species.

ThentheflyingcarpettookthegirltoZimbabwe,4._______sheburstintolaughterinrelief.Thereanelephanttoldherthatthey5._______(use)tobeanendang

eredspecies.6._______thattheirnumberswereincreasingwiththegovernment'shelp.Thegirlsmiledwhensheheardthatsomanyt

hings7._______(do)theretosavelocalwildlife,whichshowedthe8._______(important)ofwildlifeprotection.9._______(final),theflyingcarpetandshewerei

nathickrainforest,whereamonkeywasprotectingitself10._______mosquitoesbyrubbinganinsectoverhisbody.Themonkeyalsotold

hertopaymoreattentiontotherainforestandappreciatehowtheanimalslivetogether.四、书面表达假如你叫李华,你所生活的城市周围有很多动植物正逐渐减少,请你对此现象向有关部门写一封信,

分析造成这种现象的原因,并根据实际情况提出几条切实可行的建议。以下几条要点需包括在内:1.野生动植物的现状;2.分析造成许多野生动植物濒临灭绝的原因;3.提出几条保护野生动植物的具体措施。注意:1.不可遗漏要

点,可适当增加细节,以使行文连贯;2.词数80左右,开头和结尾已给出,不计入总词数。DearSirorMadam,I'mwritingtogivesomesuggestionstoprotectthewildlifelivinginandaroundourcity.______________

_________________________________________________________________________________________________________________________

_____________________________________________________________________________________________________________________________________________

________________________________________Ihopemysuggestionsareofmuchhelp.Yourssincerely,LiHua参考答案PartI一、1、endanger2、hunters3、alarm4、avera

ge5、habitats6、posters7、species8、immediately9、illegal10、extinction二、1、concerned2、pressure3、living4、endangered5、extinction6、rating7、before9

、adaptation10、immediately三、1、liveinharmonywith2、makingsuchgreatprogress3、underpressure4、takenecessarymeasures5、arebeing

hunted四、1.wasremindedof2.Onaverage3.havemadeprogress4.indanger5.makeout6.dyingout7.watchover8.adapttoPartII一、1-4BCDD二、1--5.CDBDB

6--10.AACCB11--15.ADBDA三、1.helping2.distant3.endangered4.where5.used6.and7.werebeingdone8.importance9.

Finally10.from四、答案：DearSirorMadam,I'mwritingtogivesomesuggestionstoprotectthewildlifelivinginandaroundourcity.Asweknow,manyspeciesofwildlifear

eindangerofextinction.Thisisbecausetheenvironmentthattheyarelivinginhasbeendestroyedgreatly.Withthedevelopmentofcities,waterandai

rareseriouslypolluted.Theirlivingareasarebecomingsmallerandsmaller.Theynotonlyhavelittletocat,butalsocanbekilledbyhumanbeings.Thesespeciesofwi

ldlifeareimportantpartofourlife.Personally,moremeasuresshouldbetakentoprotectthemfrombeinghurt.Firstly,morelawsmustbemadetostoppeop

lefromcuttingdowntrees.Secondly,allthefactoriesmustcleanthewastewaterbeforeitispouredintoriversorlakes.Thirdly,morereservesshouldbesetupsot

hattheycanlivesafely.Ihopemysuggestionsareofmuchhelp.Yourssincerely,LiHua