课时作业(三十三) [选修7 Unit3 Underthesea](限时：30分钟) Ⅰ.完形填空Acoupleofyearsago,whenmysonwasjustlearningtowalk,IfoundmyselfatthelocalSundaybootfair.MysonandIwere__1__upanddownthefield,whenwesawatablethathadsometoycarson.Isaidtomylittleboythatsincehehadbeensuchagoodboy,hecould__2__oneofthe50pcarsandIwouldbuyitforhim.Aftersometime,hechoseacaranditwasonlywhenIwentto__3__thatIrealizedthatIhad46pora￡10note.I__4__topaywiththe￡10andtheladyaskedifIhadanything__5__.Itippedoutthe46pintomy__6__andsaidthatitwasallthechangethatIhad.TheladyatthestallonlygavemeaglanceasIhelditouttoher,withanapologeticlookonmyface,andshookherheadand__7__totalktoanothercustomer.Iwasshockedather__8__.Withasinkingheart,I__9__tomyboyandstartedtotrytoexplaintohim.__10__，heburstintofloodsoftears.Justashehadcalmeddownandhadtakenmyhandtowalkoff,anelderlylady__11__myarm.Shesaid,“Excuseme,Icouldn'tbelievehowrudethatladywastoyouandyoursonandsawhow__12__yoursonwaswhenyousaidthathecouldn'thavethecarhehadchosenandsoI__13__itforhim.”Myson__14__stoppedcryingandsmiledatherasshehandedhimthecar.IwasspeechlessandburstintotearsasIwas__15__bythisstranger'skindness.Icouldn'tthankherenough.Althoughthecaronlycost50ptoher,theunexpectedkindnessandthoughtfulnessofthisstrangerstillcontinuestoaffectmylifeandmyactionstoday.1．A.wanderingB．runningC．drivingD．lying2．A.tryB．cleanC．chooseD．make3．A.restB．mendC．signD．pay4．A.triedB．managedC．agreedD．used5．A.largerB．smallerC．nicerD．smarter6．A.drawerB．pocketC．handD．wallet7．A.hadB．continuedC．refusedD．turned6\n8．A.thoughtB．spiritC．rudenessD．absence9．A.wentbackB．bentdownC．climbedupD．lookedforward10．A.ObviouslyB．ProudlyC．MercifullyD．Confidently11．A.touchedB．injuredC．handledD．separated12．A.enjoyableB．shamefulC．upsetD．patient13．A.postedB．stoleC．fetchedD．bought14．A.immediatelyB．fatefullyC．horriblyD．extremely15．A.blockedB．movedC．defeatedD．challengedⅡ.阅读理解ASomescientistssaythatanimalsintheoceansareincreasinglythreatenedbynoisepollutioncausedbyhumanbeings.Thenoisethataffectsseacreaturescomesfromanumberofhumanactivities.Itiscausedmainlybyindustrialunderwaterexplosions,oceandrilling,andshipengines.Suchnoisesareaddedtonaturalsounds.Thesesoundsincludethebreakingoficefields,underwaterearthquakes,andsoundsmadebyanimalsthemselves.Decibels(分贝)measuredinwateraredifferentfromthosemeasuredonland.Anoiseofonehundredandtwentydecibelsonlandcausespaintohumanears.Inwater,adecibellevelofonehundredandninetyfivewouldhavethesameeffect.Somescientistshaveproposedsettinganoiselimitofonehundredandtwentydecibelsintheoceans.Theyhaveobservedthatnoisesatthatlevelcanfrightenandconfusewhales.AteamofAmericanandCanadianscientistsdiscoveredthatloudernoisescanseriouslyinjuresomeanimals.Theresearchteamfoundthatpowerfulunderwaterexplosionswerecausingwhalesintheareatolosetheirhearing.Thisseriouslyaffectedthewhales'abilitytoexchangeinformationandfindtheirway.Someofthewhalesevendied.Theexplosionshadcausedtheirearstobleedandbecomeinfected.Manyresearcherswhoseworkdependsonoceansoundsobjecttoalimitofonehundredandtwentydecibels.Theysaysuchalimitwouldmeananendtoimportantindustrialandscientificresearch.Scientistsdonotknowhowmuchandwhatkindsofnoisesareharmfultooceananimals.However,manyscientistssuspectthatnoiseisagreaterdangerthantheybelieved.Theywanttopreventnoisesfromharmingcreaturesintheocean.16．Accordingtothepassage,whichofthefollowingisincreasinglydangeroustoseacreatures?A．Thesoundofcars.B．Thesoundofvoices.6\nC．Manmadenoisepollution.D．Thesoundofsteps.17．Accordingtothepassage,naturalsoundsincludeallofthefollowingEXCEPT________．A．soundsmadebyanimalsthemselvesB．oceandrillingC．underwaterearthquakesD．thebreakingoficefields18．Whichofthefollowingisdiscussedinthethirdparagraph?A．Thesamenoiselevelproducesadifferenteffectonlandandintheocean.B．Differentplacesmayhavedifferenttypesofnoises.C．Thedecibelisnotasuitableunitformeasuringunderwaternoise.D．Differentoceananimalsmayhavedifferentreactionstonoises.19．Whichofthefollowingistrueofwhales?A．Theywon'tbeconfusedbynoises.B．Theyaredeaftonoises.C．Theirabilitytoreproducewillbeloweredbyhighlevelnoises.D．Theirhearingwillbedamagedbyhighlevelnoises.20．Accordingtothepassage,whatwillscientistsmostprobablydointhefuture?A．Theywillworkhardtoreduceoceannoisepollution.B．Theywillprotectanimalsfromharmfulnoises.C．Theywilltrytosetalimitof120decibels.D．Theywillstudytheeffectofoceannoisepollution.BTheseahasalwaysinterestedman.Fromitwecangetfood,minerals,andtreasure.Forthousandsofyears,wecouldsailonit.Butwecouldnotgofarbeneathitssurface.Manwantstoexploredeepintothesea.However，wearenotfish.Wemustbreatheair,sowecan'tstayunderthewater'ssurfaceforanylengthoftime.Toexploredeepwater,manfacesevenmoredangersandproblems.Adiverwhowantstostayunderwaterformorethanafewminutesmustbreatheairoraspecialmixtureofgases.Hecanwearadivingsuitandhaveairpumpedtohimfromabove.Hecancarryatankofaironhisbackandbreathethroughanoseandamouthpiece.Waterweighs800timesasmuchasair.Tonsofwaterpushesagainstadiverdeepinthesea.Hisbodyisundergreatpressure.Whenadiverisundergreatpressure,hisbloodtakesinsomeofthegaseshebreathes.Asherisestosurface,thewaterpressurebecomesless.Ifthediverrisestooquickly,thegasesinhisbloodformbubbles.Thediveristhensufferingfromthebends.Thebendscancauseadivertodoubleupinpain.Theycanevenkillhim.21．Onthewhole,thispassageisabout________.A．specialmixturesofgasesindeepseaB．theproblemsmanfacesindeepseadivingC．airpressureunderthesurfaceofseawaterD．akindofillnessthatmansuffersinthesea22．Adiver'sbodyindeepwater________.A．isundergreatpressure6\nB．isjustlikethatofafishC．suffersfromthebendsD．weighsverylittle23．Thepassagedoesnotsayso,butitmakesyouthinkthat________.A．deepdiversshouldbeingoodhealthB．diversexplorethedeepseaonlyfortreasureC．divingunderthewatertooquicklycausesakindofillnessD．thereisaspecialmixtureofgasesunderthesea24．Whydoesadivergetthebends?A．Hetriestodoexerciseunderthewater.B．Hisdivingsuitweighstoomuch.C．Hecomestothesurfacetooquickly.D．Theairinhisbloodisusedup.25．Fromthepassagewecanseethat________.A．theseabegantointerestmaninthelastfewyearsB．manisnotathomedeepintheseaC．alldiverswillgetthebendssoonerorlaterD．theairintheseawaterwillkilladiverifheisnotcareful6\n课时作业(三十三)Ⅰ.1.A 前面的语境谈到：我儿子在学走路，故选A项。2．C 我打算给他买一个，所以让他选择其中一款。3．D IrealizedthatIhad46pora￡10note应该发生在我“付款买车之际”，所以用pay。4．A 根据语境andtheladyaskedifIhadanything…判断我付钱没有成功，所以用tried。5．B 后面语境说“这就是我所有的零钱了”，判断她希望我有面额再小一点的零钱。6．C 根据下文asIhelditouttoher判断“我把钱放到手里”恰当。7．D 她刚才与我说话，这时又去与另外一个顾客交谈，所以“转向”恰当。8．C 售货员只是瞅了我一眼，却不搭理我，转向了另外一个顾客，所以认为是“粗鲁的”。9．B 前面提到孩子刚刚学走路，所以个头应该不高，因此我想安慰他，需要弯下腰。10．A 孩子没有得到他想要的东西，很明显他开始哭泣了。11．A 我想离开，这时一位老妇人拦住我，可判断touched贴切。12．C 孩子没有得到他想要的东西，开始哭泣了，可判断upset贴切。13．D 根据下文thecaronlycost50ptoher可判断bought恰当。14．A 孩子想要的玩具到手了，所以立即停止了哭泣。15．B 老人的善良打动了我，所以哭了，说不出话来。Ⅱ.A研究表明，噪音污染危及了海洋生物的生存。科学家将来要采取措施拯救海洋生物，阻止噪音对海洋生物的伤害。16．C 细节理解题。由第一段Somescientistssaythatanimalsintheoceansareincreasinglythreatenedbynoisepollutioncausedbyhumanbeings.可知，噪音污染危及了海洋生物的生存。17．B 细节理解题。由第二段Thesesoundsincludethebreakingoficefields,underwaterearthquakes,andsoundsmadebyanimalsthemselves.可知，oceandrilling不是自然的声音。18．A 19．D 推理判断题。由第六段Theresearchteamfoundthatpowerfulunderwaterexplosionswerecausingwhalesintheareatolosetheirhearing.可知，水下巨大的爆炸声会使鲸失去听力。20．B 推理判断题。由文章的最后一句话Theywanttopreventnoisesfromharmingcreaturesintheocean.可知，科学家将来要采取措施阻止噪音对海洋生物的伤害。B自古以来，海底丰富的资源一直吸引着人类。然而，从事深水潜水探索却不是一件轻松的工作。本文向我们介绍的就是深水潜水员所面临的困难和挑战。21．B 主旨大意题。由文章结构可以看出，文章首先点明了海洋对我们人类的重大意义，然后提出了文章要说明的主题：Toexploredeepwater,manfacesevenmoredangersandproblems.下文围绕这一主题作了详细的说明。22．A 23．A 推理判断题。潜水员在深水里要承受巨大的压力，浮到水面时，水压骤减，这对人体来说是很大的挑战。由此可以推断从事深水潜水工作的人，身体应该健康(ingoodhealth)。24．C 细节理解题。由Ifthediverrisestooquickly…Thediveristhensufferingfromthebends.可知，潜水员得bends的原因是在海水中上升得太快。6\n25．B 推理判断题。从文章内容可以知道，在深海潜水时，人会面临更大的危险和更多的麻烦(moredangersandproblems)。由此可以判断，人在深海是很不舒适的。6
