◎ 题干
The two countries used to be ________ war with each other, but now they are ________ peace.
[     ]
A. at; in  
B. in; at
C. at; at  
D. in; in
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“The two countries used to be ________ war with each other, but now they are ________ peace. [ ]A. at; inB. in; atC. at; atD. in; in…”主要考查了你对  【介词和介词短语】  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。