◎ 题干
- It's _____ hard problem for the twins that ____ of them can work it out.
[     ]
A. so; neither                 
B. such a; neither    
C. so a; neither                      
D. such a; none
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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 _______ hard problem for the twins that _______ of them can work it out. [ ]A. so, neither B. such a, none C. so a, neither D. such a, neither …”主要考查了你对  【不定代词】【副词】  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。