listEning 1 "proFEssor’s oFFiCE" {$mEDiAurl} why DoEs thE mAn sAy this: A、hE is giving somEthing to thE proFEssor. B、hE is trying to justiFy his position. C、hE is Apologizing BECAusE hE DoEs not unDErstAn D、 D、hE is signAling thAt hE will ExplAin his proBlEm.