◎ 题干
--- Do you know who designed the CD-ROM Around the World in Eight Hours?
--- Yes. It ______ by Nancy Jackson.
A.has designed B.designed C.designs D.was designed
◎ 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“--- Do you know who designed the CD-ROM Around the World in Eight Hours? --- Yes. It ______ by Nancy Jackson.A.has designedB.designedC.designsD.was designed…”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。