Question

________ as the “first lady of speech”，Dr, Lillian Glass is recognized as one of the world's leading experts on communication skills.

A．Knowing B．Having known

C．Known D．To be known

 

Answer 1

C

【解析】根据句意及句子结构可知，句子的主语Dr，Lillian Glass实际上就是选项动词的主语，相当于As he is known as...引导的原因状语从句，为被动结构，故选过去分词known。