ShewillneverforgetSeptember1,_

发布时间：2020-07-28 00:01:57

She will never forget September 1, ________ she had her first history lesson as a teacher．A.whichB.whenC.on whichD.both B and C

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D解析考查引导词前有介词的定语从句的用法，在具体的某一天用介词on。
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