◎ 题干
I don't believe we've met before,       I must say you do look familiar.
[     ]
A. therefore        
B. although
C. since            
D. unless
◎ 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“I don't believe we've met before, I must say you do look familiar. [ ]A. thereforeB. althoughC. sinceD. unless…”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。