◎ 题干
The problem _______ at tomorrow's meeting is a very difficult one.  
[     ]
A. being discussed  
B. discussed    
C. to be discussed  
D. to discuss
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“The problem _______ at tomorrow's meeting is a very difficult one.[ ]A. being discussedB. discussedC. to be discussed D. to discuss …”主要考查了你对  【不定式的被动式】  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。