SectionⅣUsingLanguageANIMALEXTINCTIONManyanimalshavedisappearedduringthelonghistoryoftheearth.Themostfamousoftheseanimalsaredinosaurs(恐龙).Theylivedontheearthtensofmillionsofyearsago,longbeforehumanscameintobeingandtheirfutureseemedsecure(安全的)atthattime.ThereweremanydifferentkindsofdinosaurandanumberofthemusedtoliveinChina.Theeggsoftwenty-fivespecieshavebeenfoundinXixiaCounty,Nanyang,HenanProvince.Notlongagoararenewspeciesofbird-likedinosaurwasdiscoveredinChaoyangCounty,LiaoningProvince.Whenscientistsinspected(检查)thebones,theyweresurprisedtofindthatthesedinosaurscouldnotonlyrunliketheothersbutalsoclimbtrees①.Theylearnedthisfromthewaytheboneswerejoinedtogether②.动物灭绝从地球有史以来的这段漫长时期,许多动物都消失了。这些动物中最有名的是恐龙。千百万年前,恐龙就在地球上生活,比人类的出现要早得多,当时它们的前景好像也很安全。当时有许多不同种类的恐龙,其中有很多种类曾经生活在中国。25个种类的恐龙蛋是在河南省南阳西峡县发现的。不久前,在辽宁省的朝阳县新发现了一种罕见的、形状像鸟一样的恐龙。科学家们观察它们的骨头时,惊奇地发现它们不仅跟其他恐龙一样可以跑,而且还可以爬树。科学家们是根据恐龙骨骼的连接方式得知的这些。[助读讲解]①besurprisedtodosth.吃惊地做某事(todosth.是surprised的原因);that引导宾语从句,从句中run与climb为并列谓语。②thebones...是省略that的定语从句,修饰theway。Dinosaursdiedoutsuddenlyabout65millionyearsago.Somescientiststhinkitcameafteranunexpectedincidentwhenahugerockfromspacehittheearthandputtoomuchdust(尘土)intotheair.Othersthinktheearthgottoohotforthedinosaurstoliveonanymore③.Nobodyknowsforsure④whyandhowdinosaursdisappearedfromtheearthinsuchashorttime⑤.恐龙大约在6500万年前突然灭绝了。有些科学家认为恐龙灭绝是发生在一件意外事故之后,当时宇宙间一块巨石击中地球因而在空气中扬起太多的尘土。另外一些科学家则认为,地球变得太热,因此恐龙无法在地球上生活了。没有人确切地知道恐龙是由于什么原因,又是怎样在这么短的时间里从地球上消失的。[助读讲解]③此处为“too+adj.+forsb./sth.todosth.”结构,意为“对……来说,太……而不能……”。④forsure(=forcertain)“无疑地,确定地”。⑤whyandhow共同引导宾语从句,作knows的宾语。Weknowmanyotherwildplants,animals,insects(昆虫)andbirdshavediedoutmorerecently.AccordingtoaUNreport,some⑥844animalsandplantshavedisappearedinthelast500years.Thedodoisoneofthem.ItlivedontheIslandofMauritiusandwasaveryfriendly⑦animal.Pleaselistentoastoryofthedodoandhowitdisappearedfromtheearth.我们知道,近来许多其他的野生动植物、昆虫和鸟类也灭绝了。根据联合国的一份报告,在过去500年里,有大约844种动植物消失。渡渡鸟就是其中的一种。它生活在毛里求斯岛上,是一种非常友好的动物。请听一个关于渡渡鸟的故事,看看它是如何从地球上消失的。[助读讲解]⑥someadv.大约,常用在数字前,相当于about。⑦friendlyadj.友好的。第一步速读——了解文章主题和段落大意速读P30教材课文,选择最佳答案Themainideaofthepassageis.A.howdinosaurswerediscoveredB.aboutdinosaurs'extinctionC.aboutthehistoryofdinosaursD.aboutanimals'dyingout[答案]B第二步细读——把控文章关键信息细读P30教材课文,选择最佳答案1.Fromthefirstparagraphweknowthat.A.dinosaurshaverecentlydisappearedB.anumberofdinosaursusedtoliveinCanadaC.dinosaurs'existenceislongbeforehumanscameintobeingD.dinosaurscan'tclimbtreesasotheranimalsdo2.ThepossiblereasonsforthedisappearanceofdinosaursarethefollowingEXCEPTthat.A.theylivedontheearthtensofmillionsofyearsagoB.itcameafteranunexpectedincidentC.theearthgottoohotforth...