问题
选择题
Don’t use words ,expressions or phrases __________ only to people with
specific knowledge.
A．being known
B．to be known
C．known
D．having been known
答案
答案：C
这题考查过去分词做定语的用法：words ,expressions or phrases是被大家知道，所以用过去分词，句意是：不要用些只是有专业知识的人才知道的单词短语和表达法。选C。