Unit4Astronomy"Ⅰ.品句填词(用所给词的适当形式或根据语境写一个合适的词)1．Scientistsarenotsureabouttheexistence(exist)ofwateronMars,sowhetherhumanscanliveonitisn'tproved.2．Thepuzzled(puzzle)expressiononhisfacesuggestedthathewasnotabletoworkoutthedifficultproblem.3．Healsosaidthegovernmentmustbewillingtospendextramoneytopreventpeoplefromstarving.4．Thedriverlostcontrolofthecarontheslipperyroadandcrashedintoatruck.5．Technologyandinnovationarethebuildingblocksofaglobally(global)competitive21stcenturyeconomy.6．Idobelievewhatchildreneatisfundamentaltotheirhealth,growthanddevelopment.7．Moreseriously,itcanreleaseharmful(harm)chemicalsintothesoilandwaterwhendumped,orintotheairwhenburned.8．Atalltimes,youshouldwatchoutforfakewebsitesofferingdownloadsinexchangeforyourcreditcardnumber.9．Theyfoundthecrashedaircrafthadbeensmashedtopieces,killingall4aboard,3ofwhomwereforeigners.10．Thefestivalofthisyearhasbeenagreatsuccess,unlike(like)theyearbeforewhenitrainednonstop.Ⅱ.单句改错(含本单元的词汇和语法)1．Schoolworkburdenwillencouragestudentstodevelopwhenitisappropriate,andwillbeharmfulagainststudentsanduselesstoeducationwhenitisextreme.2．IfeltsoupsetandIwaspuzzling.Ididn'tmoveuntiltheyoungsecuritymanaskedmeseveraltimes.3．Thecurrentglobalimbalancehasbeen/existedfordecadesfordeeply-rootedreasons,manyofwhichsimplyreflectcommonsensereality.4．Atthedrivingschooldifferentpeopleatdifferentageshavethesamegoalandundertheinstructionofthecoachthetraineestookturntodrive.5．Unlesswegetmorefundingwe'llbeprevented∧finishingourexperimentalprogramme.6．Hisfathercontinuedtoencouragehimbutalsomadeitclear∧hedidnothavetoplayfootballifhedidn'twantto.7．Thereissomuchrainontheislandthatitsannualrainfallreachesasmanyassixtyinches.8.You'llsucceedontimebecauseyouarealwaysworkinghard.9．Theuseofcomputersasamediumofcommunicationhasgivenbirthforanewlanguagephenomenon—cyberlanguage.10.∧Hewillcometotheconferencehasexcitedeveryoneofus;wehavebeenlookingforwardtoseeinghimforyears.Ⅲ.课文语法填空Attheverybeginningtheearthwasjustacloudofdustafterthe“BigBang”.Thenthedustcombinedintoasolidglobe1．moving(move)aroundthesun.Theearthbecamesoviolent2．thatitwasnotclearwhethertheshapewouldlastornot.Theearthexplodedloudlywithfireandrock.Theywere3．intimetoproducemanythings,4．whichweretomaketheearth'satmosphere.Astheearthcooleddown,waterbegantoappearonitssurface.Itallowedtheearth5．to_dissolve(dissolve)harmfulgases.Thenlifebegantodevelop.Thefirstextremelysmallplantsmultipliedand6．filled(fill)thefirstoceansandseaswithoxygen.Thisencouragedthelater7．development(develop)ofearlyshellfishandfish.Landanimalssuchasinsects,reptilesanddinosaursappeared8．aftergreenplantsappeared.Smallcleveranimalsspreadallovertheearth.Buttheyareputtingtoomuchcarbondioxideintotheatmosphere,whichpreventsheat9．fromescapingfromtheearthintospace.Whetherlifewillcontinueontheearthformillionsofyears10．tocome(come)willdependonwhetherthisproblemcanbesolved.
