Edisonmadealotofinventions,_______

发布时间：2020-07-13 17:21:34

Edison made a lot of inventions, ________ of great importance．A.which I think areB.which I think they areC.which I think theyD.I think which are

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A解析I think是插入语。which是关系代词，其先行词是inventions，引导非限制性定语从句。
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