问题描述：
Beijing is the capitai of China.（保持原句意思） Beijing is the ＿＿＿＿＿＿＿＿＿of China.
Beijing is the capitai of China.（保持原句意思） Beijing is the ＿＿＿ ＿＿＿ ＿＿＿of China.
Beijing is the capitai of China.（保持原句意思） Beijing is the ＿＿＿ ＿＿＿ ＿＿＿of China.
问题解答：
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