◎ 题干
Somebody rang my doorbell just now, but I didn't know _____.

[     ]

A. who were they
B. who they were
C. who it was
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“Somebody rang my doorbell just now, but I didn't know _____. [ ]A. who were they B. who they were C. who it was …”主要考查了你对  【人称代词】【宾语从句】  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。