◎ 题干
I had just locked my door ________ I realized I ________ my key on the kitchen table.
[     ]
A. as;  left  
B. when;  had left
C. after;   left  
D. while;  had left
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“I had just locked my door ________ I realized I ________ my key on the kitchen table. [ ]A. as;leftB. when;had leftC. after; leftD. while;had left…”主要考查了你对  【并列连词】【过去完成时】  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。