◎ 题干
Learn to think ________ we are young, or we may never learn.      
[     ]
A. during  
B. when  
C. before   
 D. after
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Learn to think ________ we are young, or we may never learn.[ ]A. during B. when C. beforeD. after…”主要考查了你对  【从属连词】【状语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。