◎ 题干
I didn't know _____ yesterday.
[     ]
A. why isn't Danny in school
B. why wasn't Danny in school
C. why Danny isn't in school
D. why Danny wasn't in school
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Ididn't know _____ yesterday.[ ]A. why isn't Danny in schoolB. why wasn't Danny in schoolC. why Danny isn't in schoolD. why Danny wasn't in school…”主要考查了你对  【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。