__.A.havealreadycausedgreatdamagetotheArcticB.willstopexploringtheArcticfornaturalresourcesC.shouldthinktwicebeforetheyexploreArcticdevelopmentD.arenotinterestedinexploringtheArcticfornaturalresourcesThepositionwasofferedatthelastminute,andIwasgiventwoweekstoprepare,aperiodIspentsearchingforbriefcase(公文包)andstandingbeforemyfulllengthmirror,repeatingthewords,“Hello,class.I'mMr.Davis.”SometimesIwouldgivemyselfanaggressivevoice.SometimesIwouldsoundexperienced.Butwhenthedayeventuallycame,mynerveskickedinandthetrueMr.Daviswasthere.Isoundednotlikeathoughtfulprofessor,butrathera12yearoldboy.WhatcanwelearnabouttheauthorfromtheParagraph?A.Hewouldbeaggressiveinhisfirstclass.B.Hewaswellpreparedforhisfirstclass.C.Hegotnervousuponthearrivalofhisfirstclass.D.Hewaitedlongforthearrivalofhisfirstclass.