many times, he finally understood it. A．Told B．Telling C．Having told D．Having be
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_____ many times, he finally understood it.
| A．Told | B．Telling | C．Having told | D．Having been told |
试题答案
【答案】
D
【解析】本题考查非谓语的用法。tell与主语之间的关系是被动和完成的关系，所以用having been done来表示被动和完成。