6、.tobeheldB.heldC.beingheldD.holding13.Allofthemtrytousethepoweroftheworkstation_____informationinamoreeffectiveway.A.presentingB.presentedC.beingpresentedD.topresent8高二英语非谓语动词练习201314.With the world changing fast,we have something new______with all by ourselves every day