◎ 题干
They all think the problem needn’t _________. It isn’t worth _________ at all.
A.discussing; discussing B.to be discussed; discussing
C.be discussed; discussing D.to be discussed; being discussed
◎ 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“They all think the problem needn’t _________. It isn’t worth _________ at all.A.discussing; discussingB.to be discussed; discussingC.be discussed; discuss…”主要考查了你对  【被动语态】  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。