many times he finally understood it.A. Being toldB. TellingC. Having been toldD. Having

问题补充：

many times, he finally understood it.

A. Being told

B. Telling

C. Having been told

D. Having told

答案：

A. Being told

B. Telling

(答案→)C. Having been told

D. Having told

解析：考查分词做状语。本题中的动词tell与句子主语he构成被动关系，故使用可以使用过去分词done的形式，过去分词done=having been done，既表示被动也表示已经完成；句意：已经被多次告知，他最后终于理解了。故C正确。