新題型：完型填句七選五（英語一必修，英語二選修）1)考研英語大綱樣題LongbeforeManlivedontheEarth,therewerefishes,reptiles,birds,insects,andsomemammals.Althoughsomeoftheseanimalswereancestorsofkindslivingtoday‘othersarenowextinct,thatis,theyhavenodescendantsalivenow.41).Veryoccasionallytherocksshowimpressionofskin,sothat,apartfromcolor,wecanbuildupareasonablyaccuratepictureofananimalthatdiedmillionsofyearsago.Thatkindofrockinwhichtheremainsarefoundtellsusmuchaboutthenatureoftheoriginalland,oftenoftheplantsthatgrewonit,andevenofitsclimate.[A]Theshellfishhavealonghistoryintherockandmanydifferentkindsareknown.[B]Nevertheless,weknowagreatdealaboutmanyofthembecausetheirbonesandshellshavebeenpreservedintherocksasfossils,Fromthemwecantelltheirsizeandshape,howtheywalked,thekindoffoodtheyate.[C]Thefirstanimalswithtruebackboneswerethefishes,firstknownintherocksof375millionyearsago.About300millionyearsagotheamphibians,theanimalsabletolivebothonlandandinwater,appeared.Theyweregiant,sometimes8feetlong,andmanyofthemlivedintheswampypoolsinwhichourcoalseam,orlayer,orformed.Theamphibiansgaverisetothereptilesandfornearly150millionyearstheseweretheprincipalformsoflifeonland,inthesea,andintheair.[D]Thebestindexfossilstendtobemarinecreature.Thereanimalsevolvedrapidlyandspreadoverlargeoverlargeareasoftheworld.[E]Theearliestanimalswhoseremainshavebeenfoundwereallverysimplekindsandlivedinthesea.Laterformaaremorecomplex,andamongthesearethesea-lilies,relationsofthestar-fishes,whichhadlongarmsandwereattachedbyalongstalktotheseabed,ortorocks.[F]Whenananimaldies,thebody,itsbones,orshell,mayoftenbecarriedawaybystreamsintolakesortheseaandtheregetcoveredupbymud.Iftheanimallivedintheseaitsbodywouldprobablysinkandbecoveredwithmud.Moreandmoremudwouldfalluponituntilthebonesorshellbecomeembeddedandpreserved.[G]Manyfactorscaninfluencehowfossilsarepreservedinrocks.Remainsofanorganismmaybereplacedbyminerals,dissolvedbyanacidicsolutiontoleaveonlytheirimpression,orsimplyreducedtoamorestableform..Nearlyallofthefossilsthatweknowwerepreservedinrocksformedbywateraction,andmostoftheseareofanimalsthatlivedinornearwater.Thusitfollowsthattheremustbemanykindsofmammals,birds,andinsectsofwhichweknownoting.[A]Theshellfishhavealonghistoryintherockandmanydifferentkindsareknown.[C]Thefirstanimalswithtruebackboneswerethefishes,firstknownintherocksof375millionyearsago.About300millionyearsagotheamphibians,theanimalsabletolivebothonlandandinwater,appeared.Theyweregiant,sometimes8feetlong,andmanyofthemlivedintheswampypoolsinwhichourcoalseam,orlayer,orformed.Theamphibiansgaverisetothereptilesandfornearly150millionyearstheseweretheprincipalformsoflifeonland,inthesea,andintheair.[D]Thebestindexfossilstendtobemarinecreature.Thereanimalsevolvedrapidlyandspreadoverlargeoverlargeareasoftheworld.[E]Theearliestanimalswhoseremainshavebeenfoundwereallverysimplekindsandlivedinthesea.Laterformaaremorecomplex,andamongthesearethesea-lilies,relationsofthestar-fishes,whichhadlongarmsandwereattachedbyalongstalktotheseabed,ortorocks.[F]Whenananimaldies,thebody,itsbones,orshell,mayoftenbecarriedawaybystreamsintolakesortheseaandtheregetcoveredupbymud.Iftheanimallivedintheseaitsbodywouldprobablysinkandbecoveredwithmud.Moreandmoremudwouldfalluponituntilthebonesorshellbecomeembeddedandpreserved.[G]Manyfactorscaninfluencehowfossilsarepreservedinrocks.Remainsofanorganismmaybereplacedbyminerals,dissolvedbyanacidicsolutiontoleaveonlytheirimpression,orsimplyreducedtoamorestableform.?Therewerealsocrablikecreatures,whosebodieswerecoveredwithahornysubstance.Thebodysegmentseachhadtwopairsoflegs,onepairforwalkingonthesandybottom,theotherforswimming.Theheadwasakindofshieldwithapairofcompoundeyes,oftenwiththousandsoflenses.Theywereusuallyaninchortwolongbutsomewere2feet.[A]Theshellfishhavealonghistoryintherockandmanydifferentkindsareknown.[C]Thefirstanimalswithtruebackboneswerethefishes,firstknownintherocksof375millionyearsago.About300millionyearsagotheamphibians,theanimalsabletolivebothonlandandinwater,appeared.Theyweregiant‘sometimes8feetlong,andmanyofthemlivedintheswampypoolsinwhichourcoalseam,orlayer,orformed.Theamphibiansgaverisetothereptilesandfornearly150millionyearstheseweretheprincipalformsoflifeonland,inthesea,andintheair.[D]Thebestindexfossilstendtobemarinecreature.Thereanimalsevolvedrapidlyandspreadoverlargeoverlargeareasoftheworld.[E]Theearliestanimalswhoseremainshavebeenfoundwereallverysimplekindsandlivedinthesea.Laterformaaremorecomplex,andamongthesearethesea-lilies,relationsofthestar-fishes,whichhadlongarmsandwereattachedbyalongstalktotheseabed,ortorocks.[G]Manyfactorscaninfluencehowfossilsarepreservedinrocks.Remainsofanorganismmaybereplacedbyminerals,dissolvedbyanacidicsolutiontoleaveonlytheirimpression,orsimplyreducedtoamorestableform..Ofthese,theammonitesareveryinterestingandimportant.Theyhaveashellcomposedofmanychambers,eachrepresentingatemporaryhomeoftheanimal.Astheyounggrewlargeritgrewanewchamberandsealedoffthepreviousone.ThousandsofthesecanbeseenintherocksontheDorsetCoast.[A]Theshellfishhavealonghistoryintherockandmanydifferentkindsareknown.[C]Thefirstanimalswithtruebackboneswerethefishes,firstknownintherocksof375millionyearsago.About300millionyearsagotheamphibians,theanimalsabletolivebothonlandandinwater,appeared.Theyweregiantsometimes8feetlong,andmanyofthemlivedintheswampypoolsinwhichourcoalseam,orlayer,orformed.Theamphibiansgaverisetothereptilesandfornearly150millionyearstheseweretheprincipalformsoflifeonland,inthesea,andintheair.[D]Thebestindexfossilstendtobemarinecreature.Thereanimalsevolvedrapidlyandspreadoverlargeoverlargeareasoftheworld.[G]Manyfactorscaninfluencehowfossilsarepreservedinrocks.Remainsofanorganismmaybereplacedbyminerals,dissolvedbyanacidicsolutiontoleaveonlytheirimpression,orsimplyreducedtoamorestableform.45),About75millionyearsagotheAgeofReptileswasoverandmostofthegroupsdiedout.Themammalsquicklydeveloped,andwecantracetheevolutionofmanyfamiliaranimalssuchastheelephantandhorse.Manyofthelatermammalsthoughnowextinct,wereknowntoprimitivemanandwerefeaturedbyhimincavepaintingsandonbonecarvings.[C]Thefirstanimalswithtruebac