◎ 题干

__________this is only a small town,it's crowded with tourists who come here all year round.    

[     ]
A. Since                            
B. Unless    
C. Once                              
D. Although
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“__________this is only a small town,it's crowded with tourists who come here all year round. [ ]A. SinceB. Unless C. OnceD. Although…”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。