Hekeepsarecordofeverything_____

发布时间：2020-07-28 03:55:33

He keeps a record of everything_________ he had seen there．A.aboutB.thatC.whichD.what

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B解析先行词是all/everything/nothing/anything/something/much/little/none等不定代词时，引导定语从句的词用that。
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