◎ 题干
Though we don't know what is discussed, yet we can feel the topic _______.
A. had changed
B. will change
C. was changed
D. has been changed
◎ 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“Though we don't know what is discussed, yet we can feel the topic _______. [ ]A. had changed B. will changeC. was changed D. has been changed …”主要考查了你对  【现在完成时的被动语态】  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。