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1、Unit2SailingtheoceansUsingLanguageⅠ.单词拼写1．TheRedArmymensufferedmanyhardshipsduringtheLongMarchwithlittletoeatandwithoutwarmclothes.2．Gradually,_thechildrenbegantounderstandmoreandmore.3．Victoryinthelastgamegavethemapsychologicaladvantageovertheiropponents.4．Thistypeofwo
2、rkrapidlybecomesroutineandattractsnobody.5．Canfuturereallybeforeseen?Ⅱ.单句改错1．Tom,inadditionhisclassmates,alsojoinsintheactivities.addition后加to2．Dressinginablueskirt,thegirllooksverypretty.Dressing→Dressed3．Agoodnightoutwillhelpyoutakeyourmindsoffexams.minds→mind4．Maryte
3、aredthelettertopieceswithoutreadingit.teared→tore5．I'monadilemmaoverwhethertotellhimornot.on→inⅢ.阅读理解AThevastseasurroundingthecontinentshasalwaysinterestedthebravehumanbeing.Fromtheseamancangetfood,minerals,aswellastreasure.Forthousandsofyears,manhasbeensailingonit,buth
4、ecouldnotgetfarbeneathitssurface.Manhasbeendreamingofexploringdeepintothesea.However,thisisonlyadreamasheisnotafish.Tostaydeepintheseahemustbreatheair,sohecan'tstayunderthewater'ssurfaceforanylengthoftime.Toexploredeepwater,manisconfrontedwithevenmoredangersandproblems.
5、Adiverwhowantstostayunderwaterformorethanafewminutesmustbreatheinandoutairorhaveaspecialmixtureofgasesifnaturalairisnotavailable.Asarule,hemaywearadivingsuitandhaveairpumpedtohimfromabovethewater.Heisequippedwithatankofaironhisbackandbreathethroughahose(软管)andamouthpiec
6、eattachedtothetank.Itisdangeroustodiveunderwaterbecausewaterweighs800timesasmuchasair.Tonsofwaterpushesagainstadiverwhenhedivesdeepintothesea.Hisbodyisundergreatpressure.Whenadiverisundergreatpressure,hisbloodtakesinsomeofthegaseshebreathes.Asherisestosurface,thewaterpr
7、essurebecomesless.Ifthediverrisestooquicklytothewatersurface,thegasesinhisbloodwillnotdisappear,instead,theyformbubbles.Thediveristhenlikelytobesufferingfromthebends(潜水员病)．Thebendscancauseadivertodoubleupinpain.Ifthediverdoesnottakecertainmeasurestoprotecthimself,theyca
8、nevenkillhim.1．Onthewhole,thispassageisabout________.A．specialmixturesofgasesindeepseaB．theproblemsmanfacesind
