◎ 题干
---I called you yesterday, but no one answered.
---I ______ my car when you called me.
A.was washing,B.washedC.washing,D.am washing
◎ 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“---I called you yesterday, but no one answered.---I ______ my car when you called me.A.was washing,B.washedC.washing,D.am washing…”主要考查了你对  【一般现在时】【过去进行时】【过去完成进行时】  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。