◎ 题干
Water is vital _____every living thing ______, without which the world would be a dead place.   
[     ]
A. to keeping; alive    
B. to keep; living    
C. to keeping; lively  
D. to keep; alive
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Water is vital _____every living thing ______, without which the world would be a dead place.[ ]A. to keeping; aliveB. to keep; living C. to keeping; live…”主要考查了你对  【形容词】【动名词】  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。