Unit4Astronomy:thescienceofthestarsReading（Ⅱ）考点about宾1.Eachreligionandculturehasitsownideasabouthowlifebeganonearth.Whatdoyouknow?每种宗教和文化都有它自己关于地球上生命起源的看法。你了解些什么呢？howlifebeganonearth作介词_______的___语，宾语从句可作介词的宾语。考点原因2.Nooneknowsexactlyhowtheearthbegan,asithappenedsolongago.没有人准确地知道地球的起源，因为那发生在很久以前本句为复合句,as引导的从句表示_______。(1)since表示听者或读者已知的原因,即表达已知信息。(2)because表示听者未知的原因，可回答why的提问，也可用在强调句型中成为被强调成分，而其他几个词则无此用法。(3)as与since接近，但原因程度比since更强烈。(4)for并不表示直接原因,只是为主句所说的话提供推断的理由，引导的分句不能放在句首。3.Whatitwastobecomewasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintoasolidglobe.它(地球)将成为什么样子一直是个谜，直到45~38亿年以前,这些尘埃凝聚成一个固体球体。考点betodosth.(1)表示“应当/必须做某事”，通常用于通知和说明书里。(2)表示“按计划或安排将要做某事”，其完成式则表示“本来打算做某事”。(3)表示“将来不可避免要发生的事”。4.Whatitwastobecomewasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintoasolidglobe.1.Whatitwastobecome…变成……是……1）_________________________(使大家吃惊的）isthathedidn’tcometothemeeting.2）_____________（他所做的）addedtoourdifficulty.WhatsurprisedeverybodyWhathedid5.solidn.固体solid,liquid,gasadj.固体的；实心的,无空隙的；结实的，坚固的solidfuelssolidfoodasolidspheresolidfurnitureamanofsolidbuild1)Matterhasthreestates:solid,liquidandgas.2)Whenwaterfreezes,itbecomessolidandwecallitice.6.Theywereintimetoproducecarbon,nitrogen,watervapourandothergases.intime(forsth/todosth):notlate及时；不迟Shewillbebackintimetopreparedinner.她来得及回来准备晚饭。intime:soonerorlater;eventually迟早；最后；终于I’llseehimintime.总有一天我会遇见他。(1)intimein/outoftime:in/notinthecorrecttime合/不合节拍Theaudienceclappedintimetothemusic.观众合着音乐的节拍拍手。(2)explode1).（使某物）炸开，爆炸2).（指感情）迸发3).（指人口）突然或迅速增加explodewith/in/into...Thefireworkexplodedinhishandandhewashurtseriously.Thechildrenexplodedintolaughter.Theteacherexplodedwithanger.Nowitisnoteasytofindjobswiththeexplodingworldpopulation.explosionn.爆炸（声）explosiveadj.爆炸性的，易爆炸的cool1)v.使冷却，使凉爽Pleaseopenthewindowtocooltheroom.Don’tdrinktheteabeforeitcoolsalittle.2)adj.凉爽的;冷静的，沉着的;冷漠的，冷淡的be/get/seem/keepcoolHissongsreceivedacoolresponsefromthepublic.7.Astheearthcooleddown,waterbegantoappearonitssurface.随着地球的冷却,地球的表面开始出现了水。3）cooldowna.凉快起来，冷却b.指人的心境“平静下来，使……平静下来”Aheatedargumentcanbesettledbetterifbothsidescooldownfirst.Itriedtocoolherdownbutshewasstillveryangrywhensheleft.Don’tcovertheTVuntilitcoolsdown.8.Theseanimalsweredifferentfromalllifeformsinthepasr,…2）他们的品位和我不同。Theirtastesaredifferentfrommine.bevery/much/quite/entirely/totallydifferentfrom与……不同Citylifeisquitedifferentfromcountrylife.1）城市生活和农村生活很不同。therearedifferencesbetween…and………与……之间有不同之处tell…from…把……与……区分开来thesameas…与……一样besimilarto与……相似【拓展】beharmfulto对……有害doharmtosb.=dosb.harm伤害某人，对某人有害处1)Pollutionisespeciallyharmfultoanimals.2)Smokingwilldoyoualotofharm.Itdoesnoharm(forsb.)todo…Thereisnoharmin(sb.’s)doingsth.9.10.Itallowedtheear...
