公共英语一级

单选题—Your city looks beautiful!
—Yes,Lots of trees and grass__________last year.

A.were planted
B.have been planted
C.planted

参考答案:A进入在线模考
本题考查被动语态和时态。“树和草被种植”,所以要用被动语态。last year要求动词用过去时。