Unit3UndertheseaⅠ.阅读理解A体裁：说明文话题：海洋词数：318时间：7′Theseaishometobillionsofplantsandanimals.Manyliveonlynearthesunlitsurface.Oceanographersclassifymarinelivingbeingsbyseparatingthemintotwomaingroups：plantsandanimals.Therearetwogeneraltypesofplantsfoundintheocean，thosehavingrootsthatareattachedtotheoceanbottomandthosenothavingrootswhichsimplydriftaboutwiththewater.Therootedplantsintheoceanareonlyfoundinshallowwaterbecausethereisnotenoughsunlighttosustainphotosynthesis(光合作用)indeeperwaters.Sincesunlightdoesnotpassmorethanafewhundredfeetintotheocean，mostoftheoceanisnotcapableofsupportingrootedplants.Themostplentyplantsintheoceanareknownasphytoplankton(浮游生物)．Theseareusuallysingle－celled，minutefloatingplantsthatdriftthroughoutthesurfacewatersoftheocean.Togrow，phytoplanktonneednutrientsfromtheseawaterandlotsofsunlight.Marineanimalsaredividedintothreegroups：zooplankton，nekton，andbenthos.Zooplanktonaredriftinganimalsandareusuallysmall，however，theycangrowtofairlylargesize.Forexample，thejellyfishandthePortugueseman－of－warareexamplesoflargertypesofzooplanktonwhichareunabletopropel(推进)themselveseffectively.Nektonarethefreeswimmersandprobablythelargestportionoffamiliaranimalsfoundintheoceanbelongtothisclass.Commonfishes，theoctopus，whales，eelsandsquidareallexamplesofnekton.Thethirdtypeofseaanimalsspendsitsentirelifeonorintheoceanbottom.Thisgroupofmarineanimalsiscalledthebenthos.Someofthesecreatures，suchaslobstersandsnails，maybeabletomoveaboutonthebottombuttheirlifestyleissoboundupwiththeoceanfloorthattheyareunabletosurviveawayfromthisenvironment.【语篇解读】海洋是成千上万种动物和植物的家乡。海洋植物主要有两种：有根植物和浮游植物；海洋动物大体可分为三类：浮游动物、游泳动物和海底动物。1．Thetextmainlytellsussomethingabout________．A．marineplantsandmarineanimalsB．twotypesofseaplantsC．threekindsofseaanimalsD．smallandbiganimalsintheocean答案A[主旨大意题。本文主要讲述了海洋生物的分类(海洋植物和海洋动物)以及他们的特点。]2．Whycan'twefindtherootedplantsindeepwateroftheocean?A．Becausetherearetoomanyrocksatthebottomoftheocean.B．Becausetherootedplantscan'tstandthecoldnessoftheocean.C．Becausethereisnotenoughsunlightforthemindeepwater.D．Becausetherootedplantsneedmoresunlightthanplantswhichhavenoroots.答案C[细节理解题。根据第二段可知，有根植物不能生存在很深的海底是因为那儿没有充足的阳光来进行光合作用。]3．Oneofthecharacteristicsofzooplanktonisthat________．A．theyaresmallandnevergrowtolargesizeB．someofthezooplanktoncan'tswimeffectivelyC．theycanswimfreelyindeepwateroftheoceanD．theyneedmoresunlightthanotheranimalsintheocean答案B[细节理解题。根据第四段最后一句可知，有些zooplankton不能自己有效地推进自己，也就是说它们不能有效地游泳。]4．Accordingtothelastparagraph，wecanconcludethat________．A．benthosliveonthesurfaceoftheoceanwaterB．someofthebenthoscan'tlivewithouttheoceanfloorC．benthosspendmostoftheirtimeswimmingintheoceanD．benthoscanmoveaboutinthemiddleoftheseawater答案B[细节理解题。根据短文最后一句可知benthos离开海底不能生存。]B体裁：记叙文话题：人物与事件词数：294时间：6′AmanoncetelephonedVincentPeale，afamouspsychologist(心理学家)．HewasverysadandinlowspiritsandtoldtheVincentPealethathehadnothinglefttolivefor.Pealeinvitedthemanovertohisoffice.“Everythingisgone，andIfeelhopeless，”themantoldhim.“I'mlivingindeepestdarkness.Infact，I've...
