大学英语核心语法结构练习81.___theearthtobeflat,manyfearedthatColumbuswouldfallofftheedgeoftheearth.A)HavingbelievedB)BelievingC)BelievedD)Beingbelieved2.SirDenis,whois78,hasmadeitknownthatmuchofhiscollection__tothenation.A)hasleftB)istoleaveC)leavesD)istobeleft3.Beforethefirstnon-stopflightmadein1949,it________necessaryforallplanestolandforrefueling.A)wouldbeB)hasbeenC)hadbeenD)wouldhavebeen4.________mightbeexpected,theresponsetothequestionwasverymixed.A)AsB)ThatC)ItD)What5.IfIcorrectsomeone,Iwilldoitwithasmuchgoodhumorandself-restraintasifIweretheone________.A)tocorrectB)correctingC)havingcorrectedD)beingcorrected6.Imakenotesinthebackofmydiary________thingstobemendedorreplaced.A)byB)inC)withD)of7.Theroomisinaterriblemess;it________cleaned.A)can’thavebeenB)mustn’thavebeenC)shouldn’thavebeenD)wouldn’thavebeen8.Thetraditionalapproach________withcomplexproblemsistobreakthemdownintosmaller,moreeasilymanagedproblems.A)todealingB)indealingC)dealingD)todeal9.Wewerestruckbytheextent________whichteachers’decisionsservedtheinterestsoftheschoolratherthanthoseofthestudents.A)toB)forC)inD)with10.TheancientEgyptiansaresupposed________rocketstothemoon.A)tosendB)tobesendingC)tohavesentD)tohavebeensending11.Youngadults________olderpeoplearemorelikelytopreferpopsongs.A)otherthanB)morethanC)lessthanD)ratherthan12.________rightnow,shewouldgetthereonSunday.A)WouldsheleaveB)IfsheleavesC)WereshetoleaveD)Ifshehadleft13.It’salready5o’clocknow.Don’tyouthinkit’sabouttime________?A)wearegoinghomeB)wegohomeC)wewenthomeD)wecangohome14.Today,__majornewproductswithoutconductingelaboratemarketresearch.A)corporationshardlyintroduceeverB)corporationshardlyeverintroduceC)hardlycorporationsintroduceeverD)hardlycorporationseverintroduce15.I’vealreadytoldyouthatI’mgoingtobuyit,________.A)howevermuchitcostsB)howeverdoesitcostsmuchC)howmuchdoesitcostD)nomatterhowitcosts16.Meltedironispouredintothemixermuch_teaispouredintoacupfromateapot.A)inthesamewaylikeB)inthesamewayw