◎ 题干
When I got home, my son _____.
[    ]
A. has slept
B. have slept
C. was sleeping
D. slept
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“When I got home, my son _____. [ ]A. has slept B. have slept C. was sleeping D. slept …”主要考查了你对  【过去进行时】  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。