﹣The air here is much fresher than before.
﹣Exactly! We a lot of trees in the past few years.( )
A.plantedB.were planting
C.have plantedD.will plant
﹣The air here is much fresher than before.
﹣Exactly! We a lot of trees in the past few years.( )
A.plantedB.were planting
C.have plantedD.will plant