摘要: 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 [解析] know 与words, expressions, phrases是动宾关系.要用过去分词作定语.表示被动.having been known是现在分词完成时的被动式不能作定语.译文:不要使用只有具有专业知识的人才知道的词语.答案为D.

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