文本内容:
Unit1ride togethergrandparentUnit2drop crossmeat woodits happilylosea pieceofUnit3keep exercisejog healthytakecare of4Unitair placeTree PlantingDayUnit5land EarthspaceUnit6piano moveeasy aloudstep onUnit7close afraidkid worrytired cleverdifficultUnit8partyUnit9Big Benthe GreatWalltravel theEiffel Towerplacesof interestthe GoldenGate Bridge。