◎ 题干
In the past, ice             food.

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
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“In the past, ice food, butnowwehaverefrigerators.[ ]A. used to keepB. used to be used for keepingC. was used to keeping D. used to be used to keeping …”主要考查了你对  【动词短语】【一般过去时的被动语态】  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。