题目

 At that time ,his country was ____ Japan, so hearing from him was extremely difficult. A. at war with         B. at the war with    C. at war against  D. during the war with 答案：A 考查固定短语的用法。Be at war with与----交战，war前为零冠词，故排除A,D; 介词应该用with,故排除B

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