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    精英家教网 > 初中英语 > 题目详情
    E-books ______ in the 1990s.

    A.appear
    B.appeared
    C.was appeared
    D.have been appeared
    B
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    科目：初中英语 来源：0101 期中题 题型：单选题

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

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