◎ 题干
— It's a long time________I saw you last.
— Yes, and what a pity it is now that it will be a long time________we see each other again.
[     ]
A. before;  since  
B. since;  when
C. since;  before  
D. when;  before
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— It's a long time________I saw you last.— Yes, and what a pity it is now that it will be a long time________we see each other again. [ ]A. before;sinceB. …”主要考查了你对  【从属连词】  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。