核心考点九 非谓语动词
——在高中英语中地位重要
1．________ 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
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。
答案 C
2．—Why do you look sad?
—There are so many problems ________.
A．remaining to settle B．remained settling
C．remaining to be settled D．remained to be settled
解析 由于remain是不及物动词，故应用现在分词remaining，相当于定语从句that remains；动词settle置于remain之后，应用动词不定式的被动结构来表示动作还未完成。
答案 C
