练习:1.-Hi,Tracy,youlooktired.-I’mtired.I___thelivingroomallday.A.paintedB.hadpaintedC.havebeenpaintingD.havepaintedEx2.-Howareyoutoday?-Oh,I______asillasIdonowforaverylongtime.A.didn’tfeelB.wasn’tfeelingC.don’tfeelD.haven’tfelt3.Nowthatsheisoutofajob,Lucy_______goingbacktoschool,butshehasn’tdecidedyet.A.hadconsideredB.hasbeenconsideringC.consideredD.isgoingtoconsider4.Thecrazyfans___patientlyfortwohours,andtheywouldwaittillthemoviestararrived.A.werewaitingB.hadbeenwaitingC.hadwaitedD.wouldwait5.-Thewindowisdirty.-Iknow.It_______forweeks.A.hasn’tcleanedB.didn’tcleanC.wasn’tcleanedD.hasn’tbeencleaned6.Thescientist______theexperimentforhalfayear,buthe______yet.A.made;didn’tsucceedB.made;hasn’tsucceededC.wasmaking;didn’tsucceedD.hasbeenmaking;hasn’tsucceeded7.Thewoundedsolider______inthesnowforhours.A.lieonhisbackB.hasliedonhisbackC.hasbeenlayingonhisbackD.hasbeenlyingonhisback8.I’mgladtoseethatyou_____alotofprogresssinceI______youlast.A.willmake;havemetB.havebeenmaking;metC.hadmade;metD.havemade;meeting9.She_____inthisschool_____thepasttenyears.A.wasteaching;sinceB.hadbeenteaching;sinceC.wouldteach;forD.hasbeenteaching;for10.Nowthatsheisoutofajob,Lucy____goingbacktoschool,butshehasn’tdecidedyet.A.hadconsideredB.hasbeenconsideringC.consideredD.isgoingtoconsider11.Lindafeelsexhaustedbecauseshe____somanyvisitorstoday.A.hasbeenhavingB.hadbeenhavingC.washavingD.hadhad12.-I____sobusilyrecentlythatI____notimetohelpyou.-That’sOK.Icanmanageitbymyself.A.havebeenworking;haveB.haveworked;hadC.amworking;willhaveD.hadbeenworking;hadhad13.-Haveyoufinishedthereport?-No.I________itallthisweek.A.willdoB.haddoneC.havedoneD.havebeendoing14.Yearsagowedidn’tknowthis,butrecentscience____thatpeoplewhodon’tsleepwellsoongetill.A.showedB.hasshownC.willshowD.isshowing