◎ 题干
_____ many times, he finally understood it.
[     ]
A. Told
B. Telling
C. Having told
D. Having been told
◎ 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“_____ many times, he finally understood it. [ ]A. ToldB. TellingC. Having told D. Having been told …”主要考查了你对  【现在分词的被动式】【现在分词的完成式】  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。