◎ 题干
So difficult _______ that no one could ______ a good solution to it.
 [     ]
A. was the problem; come up with    
B. the problem was; come up with
C. the problem was; put up with      
D. was the problem; put up with
◎ 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“So difficult _______ that no one could ______ a good solution to it.[ ]A. was the problem; come up withB. the problem was; come up withC. the problem was;…”主要考查了你对  【动词短语】【部分倒装】  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。