【题目】We are standing at an important c in the history of our species.
在线课程【答案】crossroads
【解析】句意：我们正站在人类历史的重要交叉点。at a crossroads"在紧要关头，处在关键时刻，在一个十字路口“，故填crossroads。
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We are standing at an important c in the history of our species.
编辑：chaxungu时间：2026-04-27 03:15:49分类：高中英语题库
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