《科技英语》单选试题：单选题（共20道试题，共100分。）1.____twice,thepostmanrefusedtodeliverourlettersunlesswechainedourdog.A.BeingbittenB.BittenC.HavingbittenD.Tobebitten满分：5分2.WhenBobandhisfriendscame,we____oursupperthen.A.hadB.werehavingC.haveD.arehaving满分：5分3.Forthetimebeing,Philipscouldnotsaywhensuchaproductasthismightbe______available,however.A.verticallyB.commerciallyC.horizontallyD.rapidly满分：5分4.Thankheavens!Youhavecomebackhome.Youshouldbethankfulthatyouhaveescapedwithonly______injuries.A.minorB.majorC.significantD.abundant满分：5分5.IknowJonathanquitewellandneverdoubt______hecandoagoodjobofit.A.whileB.thatC.Whenwww.yxndhb.comwww.czjtdjs.cnD.what满分：5分6.Itwasin2005_____webegantointroducethisnewtechniqueintoourcompany.A.whichB.thenC.WhenD.that满分：5分7.Manychildren,_______parentsareawayworkinginbigcities,aretakengoodcareofinthevillage.A.需要这一门作业答案加我QQ800020900我有这个奥鹏作业答案theirB.whoseC.whomD.those满分：5分8.Itisthebusinessofthepetroleumindustrytofindcrudeoilandgasandto______themfromtheearthon-shoreandoff-shore.A.retrieveB.exchangeC.proceedD.change满分：5分9.______issheinLondonthansheringsupheroldfriendMary.A.ScarcelyB.RarelyC.NosoonerD.Hardly满分：5分10.He_____havecompletedhiswork;otherwise,hewouldn'tbeenjoyinghimselfbytheseaside.A.shouldB.mustC.wouldD.can满分：5分11.Pleasebearinmindthatcorrectconductionofprecautionscanreduceor______watersidecorrosiontotheminimum.A.exportB.diminishC.embraceD.entrap满分：5分12.Therearetworoomsinthehouse,____servesasakitchen.A.thesmallerofwhichB.thesmallerofthatC.thesmallestofwhichD.thesmallestofthat满分：5分13.Theannualincomeofschoolteachersinthisplacewas______at＄900.A.processedB.assessedC.summarizedD.valued满分：5分14.Scientistshavediscoveredgeneticvariationsthatmakepeoplemorelikelytoget______oncigarettesandmorepronetodeveloplungcancer.A.retainedB.hookedC.tiredD.hanged满分：5分15.Theyaretryingto______thewastedischargedbythefactoryforprofit.A.exposeB.exhaustC.exhibitD.exploit满分：5分16.Hearingthejoke,allth