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Unit7TheSea你知道海水为什么是咸的吗？它会不会变淡或者变得更咸呢？Haveyouevernoticedthat，inthesummer，whenyoursweatdriesitwillleavemarksonyourTshirt？1Ifyougototheseaside，youwillknowthatseawaterdoesthesametoyourclothes，becauseitalsohasalotofsaltinit.Waterevaporates(蒸发)fromthesurfaceoftheseabutthesaltremains.Haveyoueverthoughtaboutwhethertheseaswillkeepgettingsaltier?Theanswerisno.Theoceanshavestayedatabout3.5percentsaltcontentforhundredsofmillionsofyears.2TheouterhardcrustofEarthismadeupofadozenorsohardplatesthatdrift(漂流)onextremelyhot，softrocklikefloatingislandsonasea.TheheatwithinEarthisnotthesameeverywhereandtheplatesmoveduetotheheat.Whenanoceanplatebumpsintoalandplate，thelessdenselandplatefloatsovertheoceanone.Theoceanfloorgetspushedunder，anditssaltyrocks，alongwithshellsandbones，arelostdeepwithinEarth.So，3根据短文内容，从上面所给选项当选出能够填入空白处的最好选项。选项中有两项为多余选项。A．Themarksaredirty.B．therearemanysaltymaterialintheoceans.C．that'swhytheseasaresaltybutdon'tgetanysaltier.D．Itmaintainsaconstantlevelofsaltindifferentways.E．Themarksaretinybitsofsalt.【答案】1—3EDCSectionⅠReading(Ⅰ)(Warmup&Lesson1)[重生词汇初识]Ⅰ.匹配以下单词的词性及汉语意思1．participateA．adj.不知道的，未知的2．evaluateB．adv.毕竟；毕竟3．arrangeC．vi.道歉4．spiritD．n.讲授，演讲5．deedE．n.祖先，祖宗6．furtherF．vt.安排，预备7．journeyG．n.行为，行动8．lectureH．vt.评估，评价9．ancestorI．adv.更远，较远10．eventuallyJ．vi.参加11．unknownK．n.旅行，旅程12．apologiseL．n.精神【答案】1—5JHFLG6—10IKDEB11—12ACⅡ.选择以下句中绝对应词组的汉语意思eq\x(A.很久之前B.填写C.成功D.查找，寻求E.堕入麻烦，堕入逆境)1．You'rebraveandcourageous.Youcanmakeit.2．Hehashadtotravelthecountryinsearchofwork.3．Youwouldn'thavegotintotroubleifyouhadtakenmyadvice.4．LongbeforeIeverwentthere，Africawasaliveinmyimagination.5．Fillouttheapplicationcarefully，andkeepcopiesofit.【答案】1—5CDEAB[教材语篇细研]第一步速读——了解文章主题和段落大意速读P8教材课文，匹配段落大意1．Part1(Paras.1～2)A．TheexplorationsofEric，theRedBiarni，Leif&Biarni2．Part2(Paras.3～5)B．WherethestoriesofVikingscomefrom3．Part3(Para.6)C．TheintroductionoftheVikings【答案】1—3CAB第二步细读——把控文章关键信息细读P8教材课文，推断正(T)误(F)1．TheVikingswerethe