◎ 题干

4.It is said that the early European playing-cards ____ for entertainment and education.
A.were being designed B.have designed
C.have been designedD.were designed
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◎ 知识点
    根据n多题专家分析,试题“4.It is said that the early European playing-cards ____ for entertainment and education. A.were being designed B.have designedC.have been designedD.were design…”主要考查了你对  【一般过去时】【一般过去时的被动语态】  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。