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考点点拨考例回顾1.Theywereintimetoproducecarbon,...,whichweretomaketheearth’satmosphere.(P25-26)【考点】atmosphere意为“大气，气氛等”。【考例】Thetopleadersofthetwocountriesareholdingtalksinafriendly_____.(湖北2008)A.atmosphereB.stateC.situationD.phenomenon【点拨】选_____。句意：这两国领导人在友好的气氛中举行会谈。atmosphere气氛。state情形，状态；situation形势，情况；phenomenon现象。2.Whatisevenmoreimportantisthatastheearthcooleddown,waterbegantoappearonitssurface.(P26)【考点】名词性从句。本句包含由what引导的主语从句和that引导的表语从句。【考例1】_____BarbaraJonesofferstoherfansishonestyandhappiness.(北京2011)A.WhichB.WhatC.ThatD.Whom【点拨】选B。分析主语从句可知，主语从句中缺少offer的宾语，故B项正确。【考例2】Iamafraidhe’smoreofatalkerthanadoer,whichis_____heneverfinishesanything.(山东2011)A.thatB.whenC.whereD.why【点拨】选_____。句意：我觉得与其说他是个实干家不如说他是个空谈家，这就是为什么他从来不会完成任何事情的原因。which引导非限定性定语从句，is后是表语从句，由句意可知which指代的内容是表语从句内容的原因，故用_____引导表语从句。3.Thisproducedachainreaction,whichmadeitpossibleforlifetodevelop.(P26)【考点】it作形式宾语，真正宾语常为不定式或从句。【考例1】Wefeel_____ourdutytomakeourcountryabetterplace.(天津2011)A.itB.thisC.thatD.one【考例2】Whydon’tyoubring_____tohisattentionthatyou’retooilltoworkon?(江西2011)A.thatB.itC.hisD.him【点拨】都选it。都考查it作形式宾语。考例1中，it指代tomakeourcountryabetterplace；考例2中，it指代_________________。Key:1.【点拔】A2.【点拔】D；why3.【点拔】thatyou’retooilltoworkon