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    37．Bows and arrows have been out of use. A．long after B．long before C．before long D．long since 【查看更多】

     

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    Bows and arrows have _______ been out of use.

    A．long after　　  B．long before　     C．before long　      D．long since

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    Bows and arrows have _______ been out of use.

    　    A．long after　　        B．long before　   C．before long　   D．long since

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