◎ 题干
Only when he read the newspaper _____ the US President Obama would deliver a speech in his university.

A. he knew
B. he had known
C. had he known
D. did he know
◎ 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“Only when he read the newspaper _____ the US President Obama would deliver a speech in his university.[ ]A. he knew B. he had known C. had he known D. did h…”主要考查了你对  【一般过去时】【部分倒装】  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。