◎ 题干
I ________ my homework while my parents ________ TV at 9 last night.
A.did; have watchedB.had done; were watching
C.was doing; were watchingD.would do; were watching
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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 ________ my homework while my parents ________ TV at 9 last night.A.did; have watchedB.had done; were watchingC.was doing; were watchingD.would do; were …”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。