◎ 题干
At home, he never seems to have time until after 10?30 pm, ________ his children have gone to bed.
[      ]
A. whose time  
B. when
C. on which  
D. by which time
◎ 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“At home, he never seems to have time until after 10?30 pm, ________ his children have gone to bed. [ ]A. whose timeB. whenC. on whichD. by which time…”主要考查了你对  【关系代词】【介词和介词短语】【非限制性定语从句】  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。