Question

【题目】 (2009·四川) __________ many times, he finally understood it.

A. Told

B. Telling

C. Having told

D. Having been told

Answer 1

【答案】D

【解析】考查非谓语动词。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。