◎ 题干
____ many times, but he still couldn't understand.

A. Having told
B. He had been told
C. Though he had been told
D. Having been told
◎ 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“____ many times, but he still couldn't understand.[ ]A. Having been told B. He had been told C. Though he had been toldD. Having told …”主要考查了你对  【过去完成时的被动语态】  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。