•Ⅰ.重要单词聚焦•1． n． 系统，体系，制度•2． n. 学说；理论•3． pron.，n.& adj. (英)万亿；(美)十亿•4． adj. 猛烈的；激烈的；强暴的•5． n. 大气层；气氛•6． prep. 不同；不像•7． adj. 有害的•8． vi.& vt. 乘；增加systemtheorybillionviolentatmosphereunlikeharmfulmultiply•9． vi. 存在；生存•10． adv. 因此；于是•11． n. 谜；难题•vt.& vi. (使)迷惑；(使)为难•12． n. 万有引力；重力•13． adj. 温和的；文雅的•14． n. 气候•15． n. 物理学家•16． vi.& vt. 碰撞；坠落•17． n．& vt. 拉(力)；拖；牵引力•18． n. 质量；团；块；大量；(复)群众existthus用心 爱心 专心1puzzlegravitygentleclimatephysicistcrashpullmass•Ⅱ.重点短语扫描•1．prevent... ... 阻止……•2． eggs 下蛋•3． one’s turn 轮到某人；接着•4．get the hang 熟悉；掌握；理解•5．watch 密切注视；当心；提防•6．depend 依靠•7． time 及时，终于•8．give 产生；分娩•9．cheer 感到高兴；感到振奋•10．now 既然fromlayinofoutoninBirth toupthat•11．break 突发；爆发out•Ⅲ.课文原句突破•1．What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.用心 爱心 专心2•[信息提取] what it was to become 是 what 引导的主语从句，what 在从句中作 become 的宾语。•[例句仿写] 使大家惊奇的是他竟没有参加会议。•________ ________ ________ ________ ________he didn’t come to the meeting.•【答案】 What surprised everybody is that •2．The earth became so violent that it was not clear whether the shape would last or not.•[信息提取] whether...(or not)引导的从句还可充当宾语、表语、同位语等。•[例句仿写] 他是否能成功地通过驾驶考试还不确定。•It is uncertain________ ________ ________ ________passing the driving test________ ________.•【答案】 whether he’ll succeed in；or not•3．This produced a chain reaction，which made it possible for life to develop.•[信息提取] which 引导非限制性定语从句，指代主句整个概念，也可...
