◎ 题干
This city is not what it used to be. It      _ rich these years.          
[     ]
A. changed                
B. was changed              
C. is changing
◎ 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“This city is not what it used to be. It_ rich these years.[ ]A. changed B. was changed C. is changing…”主要考查了你对  【现在进行时】  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。