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Unit5.ALessoninaLab一．重点词汇及拓展1.contractvi.&n．收缩；(订)合约2．floatvi.漂浮3．expandvi.膨胀→expansionn．膨胀4．mixturen．混合物→mixv．混合5．electricityn．电→electricaladj.电的，和电有关的→electricadj.发电的，用电的6．reactionn．反应→reactvi.反应7.equipmentn．设备，装备→equipvt.装置8．astonishedadj.吃惊的；惊愕的→astonishingadj.令人吃惊的→astonishvt.惊讶，吃惊→astonishmentn．惊讶，惊奇9．aimn．&v．目标；以……为目标→aimlessadj.漫无目的的10．balancen．天平；平衡→balancedadj.平衡的二．重点短语1.reactwith与……反应2．add...to往……加入3．usedto过去常常4．beproudof因……而自豪5.besupposedto理应；应该6．put...inorder使……整齐；使……有条理7．keep...outof防止……进入；不让……靠近……三．重点句型1.Itishardtothinkofaworldwithoutmetals.很难想象一个没有金属的世界。2．Hereisatablewiththemetalsthatreactmostatthetop，andthemetalsthatreactleastatthebottom.这儿有一个图表，那些反应最强烈的金属在上部，反应最不强烈的在下部。3．Thecloseryouare，themoreyou'llsee.你靠得越近，你看到的就越多。四．语法Degreesofcomparison(比较等级)一．重点词汇及拓展1．existvi.存在；生存(无被动式和进行时)归纳拓展(1)Thereexists/existed...某地有……；存在……existin在于……existon＝liveon靠……生活/生存(2)existencen．存在；生存beinexistence存在comeintoexistence开始产生，成立bringintoexistence使产生(3)existentadj.存在的；现行的例句：Wecan'texistwithoutfoodorwater.Icanhardly____________thewagethatI'mgetting.我靠我挣的工资简直难以糊口。Whendidtheworld_______________________?世界是什么时候开始存在的？【链接训练】①Hedoesn'tbelieveinthe________ofGod.A．lifeB．existC．existenceD．exhibition②Aseveryoneknows，sincetheCommunistPartyofChina________in1921，greatchangeshavetakenplaceinChina.A．cameintoeffectB．cameintoexistC．cameintoexistenceD．cameintopower2．conclusionn．结论，决定；结束，结局；协定，协议(1)cometo/arriveat/reach/drawaconclusion得出结论makeaconclusion下结论bring...toaconclusion使……结束inconclusion总而言之；最后(2)concludev．结束，断定，推断出例句：I've____________________thathe'snottherightpersonforthejob.我断定他不适合做这项工作。_____________,Iwouldliketothankyouforyourcomingtothemeeting.最后，我对各位出席这次会议表示感谢。Afterwaitingforhalfanhour,Iconcludedthathewouldn'tcomeatall.【链接训练】The________，Ithink，hedrewfromhissimpleexperimentisnotscientific.A．conclusionB．chargeC．promiseD．relation3．aimn．[C]目标，目的；[U]瞄准vt.瞄准，对准，目标在于归纳拓展(1)takeaimat瞄准，对准achieve/attainone'saim达到目的missone'saim打不中目标/达不到目的withoutaim漫无目的地(2)aimat瞄准，对准；目的在于aimgunat把枪瞄准……aimtodosth.旨在做某事beaimedat针对；目的是，旨在(3)aimlessadj.无目的的；无目标的；aimlesslyadv.无目的地；无目标地例句：Teamworkisrequiredinordertoachievetheseaims.Heaimedthegunatthebird.Mysisteraimstobeapilotwhensheleavesschool.【链接训练】Thefarmerbuiltlongfences，________keepingthewilddogsoutofthem.A．aimatB．aimforC．aimingatD．aimingfor4．formn．表格；形式；外形；状态，精神vt.&vi.形成；构成；组织；养成；培养(1)fillin/outtheform填表bein/outofform状态良好/不好intheformof...用……的形式taketheformof...采取……的形式(2)formagoodhabitof形成一种……的好习惯forminline排好队form(＝setup)acompany创办公司forminto组成……；编成……例句：Heisfillingintheapplicationform.Theteamwere_________________throughoutthewholecompetition.这个队在整个比赛过程中一直处于良好的状态。Thecookieswereall_______________________stars.那些饼干的形状像星星。They____________________________wheninhighschool.【链接训练】________，thehouseisliketheletterS.A．InformB．IntheformC．WithformD．Inaform5．balancen．天平，秤；平衡；收支差额，余额v．平衡；斟酌，权衡(1)keepabalancebetweenAandB保持A与B均衡keepone'sbalance保持(身体)平衡；保持镇静loseone'sbalance失去平衡，心慌意乱(表动作)beoutofbalance失去平衡(表状态)in/onbalance总的来说，权衡起来，两相比较(2)balanceAagainstB权衡/比较A与B(3)balancedadj.保持平衡的；均衡的例句：Canyoubalanceyourselfonskates?Youshouldbalancetheadvantagesagainstthedisadvantagesbeforeyourfinaldecision.Hissuggestionhas，onbalance，proveduseful.他的建议总的来说是有用的。【链接训练】Therearebothadvantagesanddisadvantagesintheschemeproposed，but________Ithinkweshouldbenefitbyadoptingit.A．onbalanceB．outofbalanceC．onthebalanceD．offbalance二．重点短语1．add...to...往……加入……；把……加到/进……里addupsth.＝addsth.up把……加起来addupto总共是；总计为(不用于被动语态)addthat...补充道……addin算入；包括addto增加；加到例句：Addsomeoiltothewater.往水中加入一些油。______________________andwewillseewhowin.Thecontinuousrain_____________ourdifficultyinrebuildingthedam.持续的降雨增加了我们重修大坝的困难。—DidlittleKatehelpyouwiththeworkyesterday?—Why？Yes.Butherhelp，asamatteroffact，________mydifficulty.Whatanaughtygirl!A．addeduptoB．addedupC．addedtoD．added2．usedtodosth.过去常常做某事(1)Itusedtobesaidthat...过去人们常说……Thereusedtobe...过去有……(2)be/getusedto(doing)sth.习惯于做某事(to为介词，后跟名词、代词或动名词)beusedtodosth.被用来做某事(use在此为“使用”之意，是其被动语态，后跟不定式)例句：I___________gotothecinemaalot，butInevergetthetimenow.我过去常看电影，但现在根本没时间。Theoldman_______________walkingaftersupper.这位老人习惯于晚饭后散步。Woodcan________________maketables.木材可用来制造桌子。同类辨析usedtodo与would(1)usedtodo只有过去式，表示过去常做的事或过去的状态。主要与现在比较，暗示现在不再这样了。(2)would用来表示过去反复出现的动作。多有时间状语加以限定，意为“总是”，不表示过去存在的状态。例句：HeusedtogofishingonSunday.过去他常在星期天去钓鱼。(现在已不去了)OnSundayshewouldcometomycollegetoseeme.周日他总是来学校看我。【链接训练】①Youdidn'tusetolikehimmuchwhenwewereatschool,________？A．wereweB．weren'tweC．didyouD．didn'tyou②I________inthehousewhich________booksandmagazines.A．amusedtolive；usedtokeepingB．usedtolive；hasbeenusedtokeepingC．havingbeenusedtoliving；wasusedtokeepD．usedtolive；isusedtokeep3．keep...outof...使……进不去；不让……进入；把……挡在外面归纳拓展keepaway离开，避开keepback退缩；隐瞒；留(扣)下；阻止keepsb.from(doing)sth.阻止某人做某事keepup(with)跟上；不落在后面keepitup不松劲，照原样继续下去keepoff让开，避开keepondoingsth.继续做某事keeponwith(doingsth.)继续(做某事)keepout把……关在外面；阻止入内；不参加例句：Thiswill____________________________________.这会把空气阻挡在水之外。Ihavealwaystriedto__________________theirquarrel.我总是尽可能的不卷入他们的争吵中。Youwon'tbeableto_______________h