train,fromthecitytoPudongairport.A.tobuildB.tobebuiltC.tohavebuiltD.tohavebeenbuilt14.–Heissaid___intheStatesforthreeyears.–NowonderhespeaksEnglishsowell.A.tohavestayedB.tostayC.havingstayedD.staying15.---Howdidyouknowthesurprisingnews?---Ihappened____theeventthen.A.tobecoveringB.tocoverC.coveringD.tohavecovered16.WeshallgetJim___thepassage.A.explainingB.explainedC.toexplainD.explain17.essful,butwethoughtitapitynot____you.A.invitingB.toinviteC.invitedD.tohaveinvited18.Shecamebackinahurrytowatchthefootball,only___thedoorlocked.A.findingB.tofindC.havefoundD.havingfound19.Withalotofdifficultproblems___thenewlyelectedpresidentishavingahardtime.A.tosettleB.settlingC.settledD.beingsettled20.Youhavedoneallthehouseworkforme.Itseemsthereisnothing_______.A.todoB.tohavedoneC.tobedoneD.tohavebeendone.