会计学Ex.2Itisthedevelopedcountriesthatconsumethemostenergyintheworld.Itisforcenturiesthatcarbondioxidehasthetendencytostayintheatmosphereonlyforadayorless.Itistheirveryexistencethatlow-lyingcountriesfeelisindangerfromrisingsealevels.Itisenvironmentalistswhohavetriedtostoptheearth’stemperaturerising.Itisfutureclimatechangesandtheireffectsonourenvironmentthatscientistswanttofindoutabout.Itisbyseveralmetersthattheleveloftheseacouldriseintheyearsaheadbecauseofglobalwarming.Itisouterspacethatmightprovideuswithnewenergysourcesinthefuture.在上一单元我们已经讲解了it在句中可以用作许多成分(chéngfèn),在本单元我们用图表的形式进行整理使同学们对it的用法有系统的掌握。性质性质性质引导词引导词引导词引导词引导词强调句型易混的其它从句我们用图表的形式对it的用法进行的归纳,相信同学们已经(yǐjing)对it的用法有了更清晰的认识。接下来我们对it在强调句中的用法做一小结。用在强调句型中,为了强调句子的某一成分(通常是主语(zhǔyǔ)、宾语或状语),常用结构:Itis/was＋被强调部分＋that(who)…ImetTominthestreetyesterday．①ItwasIwho(that)metTominthestreetyesterday.②ItwasTomthatImetinthestreetyesterday.③ItwasinthestreetthatImetTomyesterday.④ItwasyesterdaythatImetTominthestreet.1.Peterlentusthemoney.2.Theywantmoney.3.AllthishappenedonMonday.4.Ididn’thearfromheruntillastsummer.5.WhydoeseveryonethinkIamnarrow-minded?口诀：代词it本意(běnyì)它,既可指这又指那;时间天气均可指,谈到距离也用它;假主假宾均可作,强调句型跟that。1.Itistwoyears__Ijoinedthearmy.A.beforeB.sinceC.thatD.after2.Itwastwoyears___Ijoinedthearmy.A.beforeB.sinceC.thatD.after3.Itwasnotuntil1920____regularradiobroadcastbegan.A.whileB.whichC.thatD.since4.___isafactthatEnglishisbeingacceptedasaninternationallanguage.A.ThereB.ThisC.ThatD.It5.Itwasabout600yearsago___thefirstclockwithafaceandanhourhandwasmade.A.thatB.untilC.beforeD.when6.Ihate____whenpeopletalkwiththeirmouthsfull.A.itB.thatC.theseD.them7.TheParkersboughtanewhousebut_____willneedalotofworkbeforetheycanmovein.A.theyB.itC.oneD.which8.____noneedforustodiscusstheproblemagainsinceithasalreadybeensettled.A.IthasB.TherehasC.ItisD.Thereis9.____wasin1979___Igraduatedfromtheuniversity.A.That;thatB.It;thatC.That;whenD.It;when10.Whatapitymynewcomputerdoesn’tw