单选题 To review and assess achievements and summarize and exchange experience ＿＿＿＿＿＿＿＿＿ the task of our present congress. 的答案

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题目内容：
To review and assess achievements and summarize and exchange experience ＿＿＿＿＿＿＿＿＿ the task of our present congress.
题目选项