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    scores of times, but Derek still couldn’t understand how to use past participle in a concrete situation. A. Having explained B. Having been explained C. Though it was explained D. It was explained 【查看更多】

     

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    ________ scores of times, but Derek still couldn't understand how to use past participle in a concrete situation．


    1. A.
      Having explained
    2. B.
      Having been explained
    3. C.
      Though it was explained
    4. D.
      It was explained

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    ________scores of times, but Derek still couldn’t understand how to use past participle in a concrete situation.

    A．Having explained

    B．Having been explained

    C．Though it was explained

    D．It was explained

     

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    ______scores of times, but Derek still couldn’t understand how to use past participle in a concrete situation.


    1. A.
      Having explained
    2. B.
      Having been explained
    3. C.
      Though it was explained
    4. D.
      It was explained

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    ________scores of times, but Derek still couldn’t understand how to use past participle in a concrete situation.

    A. Having explained            B. Having been explained    

    C. Though it was explained       D. It was explained

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    ________scores of times, but Derek still couldn’t understand how to use past participle in a concrete situation.

    A．Having explainedB．Having been explained
    C．Though it was explainedD．It was explained

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