◎ 题干
In a leap year,  the extra day _____ the second month, giving it 29 instead of the usual 28 days.
  
[     ]
A. adds up            
B.is added to
C. is added up to    
D. adds to
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“In a leap year,the extra day _____the second month, giving it 29 instead of the usual 28 days.[ ]A. adds upB.is added toC. is added up to D. adds to…”主要考查了你对  【动词短语】【一般现在时的被动语态】  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。