四川洪雅县2016高考英语二轮阅读理解训练（6）[史地自然型阅读理解(二)]Ifyouareafraidofthedark，it'snotabigdeal.It'sperfectlynormaltofeelafraid.Afterall，animalsdo,too.“Fearmatters，”saysKarenWarkentin，anecologist.“It'sagoodthing，”sheadds,“becausefearmakesyoudothingsthatkeepyoualive.”Likekids，manyanimalsexperiencefearandtheyrespondtothefeelinginvarietyofways.Afrightenedturtlepullsitsheadandlegsinsideitsshell.Asmallfishwillswimawaywhenabig，hungryfishapproaches.Someanimalsrespondtofearinwaysyoumightnotexpect.Thefirstexampleisthatthefearofbeingeatencanscaresomefrogsrightoutoftheireggs.WarkentinmadethesurprisingdiscoverywhilestudyingredeyedtreefrogsinCostaRica.Inthisspecies，femalefrogsattachjellylikeclumps(果冻一样的块状物)oftheireggstotheundersidesofleaves.Theleaveshangonbranchesthatdangle(悬挂)overponds.Aftertheyhatchfromtheeggs，thetadpoles(蝌蚪)thenfallintothewater，wheretheyeventuallygrowintoadultfrogs.Treefrogeggsusuallygrowfor6daysbeforehatching.Iftheysensethatahungrysnakeisabouttoattack，however，theycanhatchupto2daysaheadoftheschedule.Asthesnakesareunabletoswim，byfallingintothewaterearly，thetadpolescanescape.Ifhatchingearlyhelpsprotectredeyedtreefrogsfromsnakes，youmightwonderwhytheireggsdon'talwayshatchsooner.Itturnsoutthathatchingearlybringsitsowndanger.Oncetadpoleslandinthewater，hungryfishandotheranimalsliketoeatthem,too.Stayingintheireggsforfull6days，then，allowsfrogembryos(胚胎)togrowbigandstrong.Thisextragrowthimprovestheirchancesofsurvivinginthewater.1.Itcanbeinferredfromthepassagethatfears________．A．helpanimalsgrowbiggerandstrongerB．arelesscommonamongyounganimalsC．helpanimalsmovealottofittheenvironmentD．aremoreorlessimportantinorderforanimalstosurvive2.Wearetoldinthepassagethattreefrogs________．A．facedangerbothinsidetheireggsandinthewaterB．willgrowfastiftheyfallintothewaterlaterC．aresurprisinglycleverwheninsidetheireggsD．stayintheireggslongeriftheyarefrightened3.Whydothetadpoleshatchupto2daysaheadoftheschedule？Because________．A．theylikefallingintothewaterearlyB．theywanttogrowintoadultfrogsC．theysenseahungrysnakeisabouttoattackD．frogembryoscangrowstrong4.Whatisthebesttitleofthepassage?A．WhatisfearB．Whydowefeelafraid?C．Youfeelafraid，andanimalsdo,tooD．Fearisagoodthing5.Whatdoyouthinkwouldbediscussedinthefollowingparagraph?A．Furtherexplanationsastowhytreefrogshatchaheadoftheschedule.B．Howtheunbornfrogsknowwhenasnakeisabouttoattackthem.C．Anotherexampleofanimalsthatrespondtofearinanunexpectedway.D．Howtreefrogsimprovetheirchancesofsurvivalbeforefallingintothewater.【参考答案解析】A【要点综述】恐惧是人类和动物常见的一种现象，恐惧是一件好事。动物对于恐惧的反应是不同的，有些反应方式甚至超乎你的想象。1．D根据第一段“…becausefearmakesyoudothingsthatkeepyoualive.”可知D项正确。2．A根据第五段的“Iftheysensethatahungrysnakeisabouttoattack，however，theycanhatchupto2daysaheadoftheschedule.”和第六段的“Oncetadpoleslandinthewater，hungryfishandotheranimalsliketoeatthem,too.”可知，它们在孵化期间害怕蛇的攻击，在水里害怕其他动物把蝌蚪吃掉。故选A项。3．C根据第五段“Iftheysensethatahungrysnakeisabouttoattack，however，theycanhatchupto2daysaheadoftheschedule.Asthesnakesareunabletoswim，byfallingintothewaterearly，thetadpolescanescape.”可知，因为对它们有威胁的蛇不会游泳，所以提前孵化出来，掉到水里，蝌蚪就能够逃脱蛇的攻击了。故选C项。4．D根据...
