急,有把握全都的回答.
使用-ing形式来完成下列句子.一些动词将用于不止一次使用laugh,compete,smile,touch,appoach,shake,1.wewereallnervousaboutthe()examinations.2.Ialwaysknowwhenmymotheristellingajoke,afterafewseconds,shealwayslooksatme()3.Businessleadersoftenlookveryserious,theydonotoftenhave()faces4.Afterthedogfellinthelake,itclimbedout()itself5.The()buildingsshowedusthatanearthquakewascoming.6.Afterwesawthecomdyshow,weleftthetheatre()7.Itisexcitingtowatch()athletesreachtheotherendoftheswimmingpool8.Theblindmanwalked()thewallsofthebuildings