◎ 题干
Their country has plenty of oil, __________ ours has none.
[     ]
A. when    
B. while    
C. before    
D. where
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“Their country has plenty of oil, __________ ours has none.[ ]A. when B. while C. before D. where…”主要考查了你对  【并列连词】  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。