In the past,ice ______food.A．used to keepB．used to be used for keepingC．was used
题型：不详难度：来源：
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 |
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答案
| B |
解析
| 考查情态动词的被动语态。句中used to be used for keeping中的used to是情态动词，意思是“过去常常”，而be used for 是动词use 的被动形式；这个句子还可以表达成：was used to keep 或used to be used to keep。 |
举一反三
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