◎ 题干
Man must keep in mind that it will be years ______ the earth recovers from the damage he makes to it.
[     ]
A. when            
B. before              
C. since            
D. until 
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Man must keep in mind that it will be years ______ the earth recovers from the damage he makes to it.[ ]A. when B. beforeC. sinceD. until…”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。