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    Professor Smith, a student the whole afternoon. Could you let him in now? A. was waiting B. is waiting C. had waited D. has been waiting 【查看更多】

     

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    Professor Smith, a student ________ the whole afternoon．Could you let him in now?


    1. A.
      was waiting
    2. B.
      is waiting
    3. C.
      had waited
    4. D.
      has been waiting

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    Professor Smith, a student ________ the whole afternoon．Could you let him in now?

    [　　]

    A．was waiting

    B．is waiting

    C．had waited

    D．has been waiting

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