◎ 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
◎ 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“—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. sin…”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。