—Your city is so beautiful. Its like a big garden.—Yes. Many trees and flowers every yea

问题补充：

—Your city is so beautiful. Its like a big garden.

—Yes. Many trees and flowers every year.

A. are planting B. are planted C. have planted

答案：

解析：此题重点考察一般现在时的被动语态的基本用法。其构成是am/is/are+done