问题
选择题
Lots of trees ________in our city over the years. It is becoming greener and greener!
A．are planting
B．have planted
C．will be planted
D．have been planted
答案
答案：D
根据over the years 表示在过的几年里，一般与现在完成时态连用，又因为主语为物，是动作的承受者，故要用被动语态，故选D