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    精英家教网 > 高中英语 > 题目详情
    The mobile phone was _____ for at least five years against the bug, but it was wrong only one year later.

    A. ensured
    B. guaranteed
    C. protected
    D. promised
    B
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    科目：高中英语 来源：同步题 题型：单选题

    The mobile phone was _____ for at least five years against the bug, but it was wrong only one year later.
    [      ]
    A. ensured
    B. guaranteed
    C. protected
    D. promised

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    科目：高中英语 来源： 题型：

    The mobile phone was ______ for at least five years against the bug，but it went wrong only one year later．

    A．recommended         B．guaranteed          C．protected            D．promised

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