◎ 题干
Don't use words, expressions, or phrases ______ only to people with specific knowledge.
[     ]
A. being known
B. having been known
C. to be known
D. known
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Don't use words, expressions, or phrases ______ only to people with specific knowledge. [ ]A. being known B. having been known C. to be known D. known …”主要考查了你对  【过去分词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。