E-books ______ in the 1990s. [ ]A.appear B.appeared C.was appeared D.have been appeared -初中英语-魔方格

◎ 题干

E-books ______ in the 1990s.

A.appear
B.appeared
C.was appeared
D.have been appeared

◎ 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“E-books ______ in the 1990s. [ ]A.appear B.appeared C.was appeared D.have been appeared …”主要考查了你对【实义动词的过去式】，【一般过去时】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。

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