◎ 题干
In the past, ice        food, but now we have refrigerators. 
[     ]
A. used to keep  
B. used to be used for keeping  
C. was used to keeping  
D. used to be used to keeping
◎ 答案
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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 the past, icefood, but now we have refrigerators.[ ]A. used to keepB. used to be used for keepingC. was used to keepingD. used to be used to keeping…”主要考查了你对  【动词短语】【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。