Unit4Astronomy:thescienceofthestars新知预习一、词汇扫描根据句意及各题括号中所给的汉语意思,从下面的方框中选取合适的单词或词组,用其适当的形式填空。combineviolentexplodeharmfulscientificallyskillmultiplydisappointpickoutpublishdevelopmentspreadpresencegraduallymasstelescopefloatexistsystemoxygen1.Hewascalminthe_________(出席；到场)ofdanger.2.Now,thepriceofthericeis_________(逐渐地)rising.3.Whenareyougoingto_________(出版)thisworksofyours?4.Tomum’s_________(失望)，herchildfailedintheexam.5.Thenewsthattsunamiscausedmorethan100,000deaths_________(传播)throughouttheworldinashorttime.6.Severaldaysago,abomb_________(爆炸)neartheshop,killing10persons.7.Theyhada_________(激烈的)quarreloverDave’sdrinking.8.Therehavebeenseveralnew_________(发展)inelec-tronics.9.Whatdoweproducewhenwe_________(化合)copperandiron?10.Whatdowemeanwhenwesaywearestudyingasubject_________(科学地)?11.Whatarethemostimportant_________(技巧)ifweneedtoberealscientists?12.Eight_________(乘)bytwoissixteen.13.Agreat_________(大量的)ofrockshadfallenfromthecliffandnowblockedtheroad.14.Thesocial_________(制度)needstobeimproved.15.Mancan’tlivewithoutwaterand_________(氧气).16.Please_________(挑选出)threemoresentencesfromthereadingpassagewithsubjectclauses.17.Smokingis_________(有害的)tohealth.18.Anastronomerobservesthespacethrough_________(望远镜).19.Wood_________(漂浮)onwater.20.Don’tbesilly.Suchathingdoesn’t_________(存在).答案:1.presence2.gradually3.publish4.disappointment5.spread6.exploded7.violent8.developments9.combine10.scientifically11.skills12.multiplied13.mass14.system15.oxygen16.pickout17.harmful18.telescope19.floats20.exist二、句型聚焦观察下列句子,试着归纳其画线部分所包含的句型结构。1.Thatmadeitpossibleforlifetobegintodevelop.___________________________2.Theyproducedyounggenerallybylayingeggs.___________________________3.Sowefeelasifthereisnogravityatall.___________________________4.…butitwillnotbeasstrongapullastheearth’s.___________________________答案:1.it在此句中充当形式宾语，真正的宾语是不定式“tobegintodevelop”。2.by表方式，后加名词、代词或动名词。3.asif/though似乎；好像；仿佛。4.as+adj.+a/an+n.(单数可数名词)=such+a/an+adj.+n.(单数可数名词)。三、语法平台观