◎ 题干
—Our city looks more beautiful!
—Yes. Lots of trees and grass _____ since last year.      
[     ]
A. have been planted
B. are planted
C. will be planted 
D. were planted
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“—Our city looks more beautiful!—Yes. Lots of trees and grass_____ since last year.[ ]A. have been plantedB. are plantedC. will be plantedD. were planted…”主要考查了你对  【被动语态】【现在完成时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。