-Iigong is becoming more and beautiful. -Yes.Lots of trees and flowers___there years.

问题描述:

-Iigong is becoming more and beautiful. -Yes.Lots of trees and flowers___there years.
A.are planted B.will be planted C.have been planted
求解析求答案!

C
过去完成时,表示一直在做(故越来越漂亮)