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11．Ancient China was a place where states were oftenatwar with each other．

分析 古代中國是一個國與國之間通常處于戰(zhàn)爭的地方．

解答 答案：at
解析：根據(jù)句意"古代中國是一個國與國之間通常處于交戰(zhàn)的地方"及所給英文提示可知，本題考查be at war"處于戰(zhàn)爭"這一固定短語；故本題答案為at．

點評 本題考查單詞填空，做此類題目時一定要仔細分析句子結構，根據(jù)句意及語法確定所填詞并注意所填詞的形式是否有變化．

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