第四课时 SectionB(1a1d)Unit7 What'sthehighestmountainintheworld?►weigh的用法①作及物动词，
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示“称……的重量”。eg：CaoChongthoughtofawaytoweightheelephant.曹冲想出了一个称大象的办法。②作不及物动词，表示“重”，后接数字。eg：Sheweighs50kilos.她的体重是50千克。【拓展】weight名词，意为“体重；重量”。►倍数表达法1．用形容词表示甲是乙的几倍时，有以下三个句型：①倍数＋形容词/副词比较级＋thaneg：Thishallisfourtimesbiggerthanmyclassroom.这个大厅比我们的教室大四倍。②倍数＋as＋形容词/副词＋aseg：AsiaisfourtimesaslargeasEurope.亚洲的面积是欧洲的四倍。③倍数＋thesize(height，length...)ofeg：Thehillisfourtimestheheightofthatsmallone.这座山的高度是那座小山的四倍。2．用名词表示“量”的倍数时，有以下两个句型：①倍数＋more＋名词＋thaneg：Therearefourtimesmorebooksinourlibrarythaninyours.我们图书馆的藏书(数量)是你们图书馆的四倍。②倍数＋asmany/much＋名词＋其他＋aseg：Thereisthreetimesasmuchwaterinthiscupasinthatone.这个杯子里的水(量)是那个杯子里的三倍。►重点短语归纳atbirth出生时liveupto活到……一、单项选择。()1.—Linda，youlookthinner.Howmuchdoyou________now?—About50kilos.A．develop B．rise C．drop D．weigh()2.Becomingafathermeansthatheisa(n)________now.A．adultB．gentlemanC．forceD．natureDA()3.JohnSmithis________ofthetwoyoungmen.A．strongB．strongerC．thestrongerD．thestrongest()4.TheSaharaisabout210________theTaklamakan，thelargestdesertinChina.A．timesaslargeasB．timesaslargerasC．timeaslargerasD．timeslarger()5.Iknow________aboutthiscitythanyou，sotellmesomeplease.A．littleB．moreC．lessD．muchCAC()6.Theworld'spopulationisgrowing________andthereis________landandwaterforgrowingrice.A．larger；lessB．larger；fewerC．more；lessD．more；fewer()7.—Tomissixandheis________hissisterJane.HowoldisJane?—Three.A．twiceasoldasB．astwiceoldasC．asoldastwiceD．asoldtwiceasAA二、根据汉语意思完成句子。8．他爸爸的体重是他的三倍。Hisfatherweighshim.9．将来人们可以活到200岁。Peoplewill200years.10．这棵树比那棵高两米。Thetreeisthanthatone.11．它每天吃掉两公斤食物。Iteatstwokilosoffood．12．熊猫可以两条腿站立。Pandascanstand．13．婴儿出生时通常闭着眼睛。Ababyusuallycloseshiseyes．threetimesasmuchasliveuptotwometerstalleradayontwolegsatbirth三、根据对话内容，从方框中选择恰当的选项补全对话，其中有两项多余。A：Hi，friends！Welcometomytown.I'myourguide，MissLin.Youcanaskmeanything.B：OK.14.____A：It'sover45，000.B：15.____A：It'sover1，000yearsold.It'sanoldtown.B：Wow，it'ssoold.16.____A：QinRiver.It'smorethan800meters.B：17.____A．Howoldisit?FACDB．What'sthematter?C．Whichisthelongestriverhere?D．Whereisit?E．Whydon'twetakeabusthere?F．What'sthepopulationofyourtown?G．Howfarisitfromhere?A：It'sinthesouthwest(西南)ofourtown.B：18.____A：It'sabout3kilometers.I'lltakeyoutherelater.B：Isee.Thankyou.G
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