many times he finally understood it.A. Told B. TellingC. Having toldD. Been told

问题补充：

many times, he finally understood it.

A. Told

B. Telling

C. Having told

D. Been told

答案：

(答案→)A. Told

B. Telling

C. Having told

D. Been told

解析：考查分词做状语的用法。分词做状语时，分词的逻辑主语必须是句子的主语。过去分词的逻辑主语是动作的承受者。Tell与he构成被动关系，所以使用过去分词表示被动，he是后面主句的主语。句意：被告知多次，他终于明白了。