5、ingB.beingpublishedC.tobepublishedD.tohavepublished11.The troubleis ______ wecan reach the conferencecenterwithin twentyminutesintherushhour.A.whatB.howC.whenD.why12.Mikehasn’tappearedfortwoweeks,______hisfriendsarewonderingwhathashappenedtohim.A.soB.butC.orD.for13.Electriccars
6、produceabout80percentlesspollutionthancars______gas-poweredmotors.A.fromB.byC.forD.with14.______ that he had fallenbehind, Peter startedto quickenhis pace.A.RealizedB.TorealizeC.HavingrealizedD.Havingbeenrealized15.Canyouimaginewhatthemodernworld______likewithoutsmartphones?A.w