2024-2025学年高中英语Unit3Underthesea单元加餐练课后作业含解析新人教版选修7

Unit3Underthesea单元加餐练Ⅰ.完形填空Pearls(珍宝)arevaluablewhitegems(珍宝)whichcomefromtheocean.Actuallytheyare1byoysters(牡蛎，蚝)，smallshellfishthatliveonthe2oftheocean.3oysterswillmakepearls;notalloystersproducethem.Oystersproducepearlsonlywhentheyare4bysand.Ifa5ofsandenterstheoyster's6，theoysterbecomeshurtbecausethe7grainofsandirritates(使……不适，刺激)thesmooth,softskinoftheoyster.Theoystertriesto8itselfbyproducingawhite9thatlookslikemilk.Theoystercoversthe10withthemilkyfluid.Thefluidprotectstheoyster.Laterthewhiteliquidbecomes11.Thishardenedliquidformsashell,orbead,aroundthesand.Atthistimeapearlisbeginningto12.Thewhitepearlgrows13insidetheoyster'sshell.14，ittakesaboutsixorsevenyearsfortheoystertoproduceapearl.Notalloystersproducepearls15mostoysterssometimestakesandintotheir16.Onlysandwhichtheoystercannotgetridofwill17it.Inotherwords，ifanoyster“swallows”somesand,itwillmanageto“spititout”．Iftheoystercannotgetridofthe18，thenitwillproducethewhitefluidto19itself.Actually,onlyaboutoneinathousandoysterswillproduceapearl；thatis，20thanonepercent.本文介绍了牡蛎制造珍宝的具体过程。1．A.invented B．broughtC．produced D．caused答案：C解析：produce“生产”，依据下文“notalloystersproducethem”可知C项正确。2．A.bottom B．baseC．surface D．ground答案：A解析：依据下文“Oystersproducepearlsonlywhentheyare4bysand.”可知牡蛎生活在海底。3．A.Onlysome B．OnlyfewC．Allof D．Alotof答案：A解析：依据下文“notalloystersproducethem”可知“不是全部的牡蛎都产珍宝，只有一些能产”。4．A.harmed B．coveredC．destroyed D．injured答案：B解析：依据上下文的逻辑关系可知，牡蛎被沙子覆盖导致沙子进入牡蛎壳内，这时牡蛎才会产珍宝。5．A.piece B．grainC．little D．bit答案：B解析：agrainofsand“一粒沙子”。6．A.shell B．bodyC．eyes D．back答案：A解析：沙子首先进入牡蛎的壳内。7．A.hard B．vividC．sharp D．rough答案：D解析：上文说牡蛎受到损害，可见沙子是粗糙的。8．A.prevent B．preserveC．protect D．guard答案：C解析：protect“爱护”。牡蛎是为了爱护自己才产生一种白色的液体。9．A.water B．matterC．liquid D．object答案：C解析：依据空格后的“thatlookslikemilk”可知牡蛎产生的东西是一种液体。10．A.injury B．shellC．sand D．pearl答案：C解析：因为沙子损害了自己的身体，所以牡蛎产生的“themilkyfluid”是把沙子盖住。11．A.bright B．hardC．strong D．pure答案：B解析：依据下文“Thishardenedliquidformsashell”可知白色液体随后会变硬。12．A.make B．produceC．do D．form答案：D解析：form“形成”。指此时珍宝起先形成。13．A.slowly B．fastC．safely D．quickly答案：A解析：依据下文“ittakesaboutsixorsevenyearsfortheoystertoproduceapearl”可知珍宝生长过程是缓慢的。14．A.Often B．ActuallyC．Usually D．Sometimes答案：C解析：usually“通常”。此处指珍宝通常的形成期为6到7年。15．A.eventhough B．incaseC．solongas D．onlyif答案：A解析：eventhough“即使”。尽管大多数的牡蛎壳内有时会进沙子，但是并非全部壳内进沙子的牡蛎都产珍宝。16．A.bodies B．shellsC．bottoms D．caves答案：B解析：依据第6处所在句说牡蛎壳内进沙子后导致珍宝的形成可知此处也是牡蛎的壳内进沙子。17．A.destroy B．irritateC．soft D．open答案：B解析：irritate“刺激，使……不适应”。此处指“只有牡蛎摆脱不掉的沙子才能刺激它”。18．A.sand B．shellC．milk D．liquid答案：A解析：依据上文“ifanoyster‘swallows’somesand”可知，牡蛎想摆脱掉的也是沙子。19．A.cover B．destroyC．produce D．protect答案：D解析：依据上文可知牡蛎产生的“thewhitefluid”是起爱护作用的。20．A.fewer B．moreC．less D．smaller答案：C解析：依据“oneinathousand”可知概率不到百分之一，lessthanonepercent“不到百分之一”，lessthan表示“少于”。Ⅱ.阅读理解Wheneveryoubuysomething,itispossiblethatsomeonehasalreadyworn,eaten,ortestedittomakesureitissafeanddowhatissupposedtodo.Butwhatifyouwantedaspecialsuittokeepasharkfromhurtingyou?Whowantstotestaproductlikeit?“Ido！”saysJeremiahSulliwan,ascientistinCalifornia.“Youhavetobelieveinwhatyousell,right？”SullivanownsSharkArmorTech,acompanythatmakesa$49,400sharksuitthatevenagreatwhitesharkcan'tbitethrough.BeforeSullivancouldsellhissharksuits,heneededtomakesurehisdesignwouldwork.Sullivanputonthesharksuitandjumpedintoasharkfeedingground.“Ineedtoknowexactlywhatahumanbodycouldexpecttogothrough，”hesays.Sharksmovedallaroundhimandthenattackedhisarm.Sullivanfeltthebitebutnoteeth.Hewasuncomfortableattimes,butnotpainful.“Thesuitworks！”“I'venowbeenbittenthousandsoftimesbutneverbadly，”saysSullivan,whonowworkswithshowslikeWildKingdom,andprogramsfortheDiscoveryChannel'sSharkWeek.So,areyouallsettobuyasharksuit?Beforeyoudo,youshouldknowthatthesuitweighs20poundsandmakesswimmingalmostimpossible—notsopracticalforadayonthebeach.Andinfact,Sullivanwantsonlyprofessionals,suchasfilmmakers,scientistsanddivers,tohavesharksuits.Why?Becauseevenifsomeoneiswearingasharksuit,theycouldgetseriouslyhurtiftheytreatdivingwitha4,000­poundsharkasagame.Duringsharksuittesting,sharkshavethrownSullivantoabottomofreefs(礁)andtriedtotakehimoffintothedeepestpartoftheocean.“However，”Sullivansays,“youdon'tneedtobeafraidofsharks.It'sactuallyprettyhardtogetasharktobiteyou.”本文主要介绍了一款防鲨服及其实际应用效果。1．Thefirstparagraphiswrittento.A．startadiscussionB．introducethetopicofthetextC．showthemainpointsofthetextD．testreaders'knowledge答案：B解析：推理推断题。依据下文紧接着介绍了Sullivan独创的防鲨服以及相关状况，由此可见第一段是为了引出本文的话题。2．WhydidSullivangetclosetosharks?A．Toseeifhissharksuitworks.B．Tostudywhatsharksfeedon.C．Tocatchaspecialkindofwhiteshark.D．Tolearnhowtoswimwithsharkssafely.答案：A解析：细微环节理解题。依据第三段其次句可知他是为了测试他的防鲨服是否有效。3．WhatdoestheunderlinedpartinParagraph5mean?A．Mostpeoplewon'twearthesharksuittothebeach.B．Peopleliketogotothebeachwiththesharksuit.C．Thesharksuitmakesaperfectdayonthebeach.D．Thesharksuitcan'tbewornforawholeday.答案：A解析：句意揣测题。依据画线部分的前一句．..thesuitweighs20poundsandmakesswimmingalmostimpossible可知防鲨服太重以至于不行能穿上防鲨服来游泳，因此多数人不会穿着它到海滩游玩。故选A。4．Wecanlearnfromthetextthatthesharksuit.A．workswellforswimmersB．islightbutuncomfortableC．keepssharksawayfromhumansD．isdesignedforspecialpurpose答案：D解析：推理推断题。依据倒数其次段第三句可知防鲨服是为特别人群打算的，有特别的用途。Ⅲ.应用文写作近年来，由于海洋污染和过度捕捞，鱼的数量和种类在急剧削减。请就此写一篇英语短文，给学校英语广播站投稿。内容要点如下：1.海洋渔业资源的现状；2.分析其缘由；3.提出解决问题的方法。留意：1.词数80左右；2.可以适当增加细微环节，以使行文连贯。Inrecentyears,fishingresourcesintheoceanhavebeenfacedwithaserioussituationwherethequantityoffishandtheirspeciesaredroppingsharply.Itishumanbehaviorthatistoblame.Industrialandagriculturalwastessuchaschemicalsandoilarepouredintotheocean.What'smore，overfishingdestroysthebalanceoflifeintheocean.Tohandlethissituation,thegovernmentshouldmakelawsandpunishthosewhocausepollution.Besides,overfishingshouldbestrictlybanned.Also，somefishermenmaytakeotherjobssothattherearefewerpeoplelivingonfishing.Onlywiththesemeasurestakencanweeventuallypreservefishingresources.Ⅳ.读后续写ItwasMother'sDayandIwasshoppingatthelocalsupermarketwithmysonwhoisfiveyearsold，Tenyson.Aswewereleavingafterfinishingourshopping，werealizedthatonlyminutesearlieranelderlywomanhadfallenoverattheentranceandhitherheadonthegroundbadly.Herhusbandwaswithher，buttherewasbloodeverywhereandthewomanwasembarrassedandclearlyinshock.Fortunately，alotofpeoplestoppedtohelpout.Whilewewerewalkingtowardsthescene，Tenysonbecameveryworriedaboutwhathadhappenedtotheelderlycouple.Hesaidtome，“Mom，it'snotmuchfunfallingoverinfrontofeveryone.”Seeingthattherewasaflowerstall(摊位)atthefrontofthesupermarket，headded，“Whyshouldn'twebuytheladyaflower？Itwillmakeherfeelbetter.”Iwasamazedthathe'dcomeupwiththissweetideawhowasonlyafive­year­oldboy.Sowewentoverandtoldtheflowersellerwhatwewanted.“Justtakeit，”shereplied，“Ican'ttakeyourmoneyforsuchawonderfuldeed.”Bynowmedicalstaffhadarrived，andwerelookingaftertheinjuredwoman.Therewesawtheoldmanwasalsoingreathorror，buthetriedtocomforthiswifeandheldherhandstightlytoencouragehertobestrong.Wegavetheflowertothewoman'shusbandandItoldhimitwasfrommyson.Atthattime，theoldmanstartedcryingandsaid，“Thankyouverymuch.”Hethenturnedtome，“Youhaveawonderfulson.HappyMother'sDaytoyou.”Themanbentdownandgavehiswifetheflower，tellingherwhoitwasfrom.Regardlessofbeingbadlyhurt，theoldladylookedupatTenysonwithloveandappreciationinhereyesandgavehimalittlesmile.Andmysonwentdownhisbodytotheinjuredladyandtenderlysaid，“HappyMother'sDaytoyou，too.”留意：1．所续写短文的词数应为150左