◎ 题干
Sugar is usually sold by _______ weight, and eggs are sometimes sold by ______ dozen. 
[     ]
A.  / , the      
B. / , a        
C. the, a        
D. the, the
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Sugar is usually sold by _______ weight, and eggs are sometimes sold by ______ dozen.[ ]A./ , theB. / , a C. the, aD. the, the…”主要考查了你对  【定冠词】【零冠词】  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。