◎ 题干
Mrs Smith ____ her keys in the office, so she had to wait until her husband ____ home.

A. has left; comes
B. left; had come
C. had left; would come
D. had left; came
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Mrs Smith ____ her keys in the office, so she had to wait until her husband ____ home. [ ]A. has left; comes B. left; had come C. had left; would come D.…”主要考查了你对  【一般过去时】【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。