◎ 题干
It ______twenty years since I came to the school.      
[     ]
A. are        
B. is        
C. was      
D. were
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“It ______twenty years since I came to the school. [ ]A. areB. is C. wasD. were…”主要考查了你对  【一般现在时】【主谓一致】  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。