◎ 题干
--- What were your parents doing at eight last night?
--- My father was cooking while my mother        .
A.watched TVB.were watching TV
C.is watching TV D.was watching TV
◎ 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“--- What were your parents doing at eight last night?--- My father was cooking while my mother .A.watched TVB.were watching TVC.is watching TV D.was watching T…”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。