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    18．( )The letter three days ago and it yesterday． A．had post.had arrived B．was posted.arrived C．posted.arrived D．had been posted.was arrived 【查看更多】

     

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    The letter ________three days ago and it __________yesterday．

    A．had post，had arrived                       B．was posted，arrived

    C．posted，arrived                                  D．had been posted，was arrived

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