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    ▲ several times, but unfortunately, the boy still couldn’t smooth away the problem on his own. A. Having been explained C. The problem had been explained B. The problem having been explained D. Although the problem had been explained 【查看更多】

     

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    ____ several times, but unfortunately, the boy still couldn’t smooth away the problem on his own.
    [     ]
    A. Having been explained              
    B. The problem having been explained
    C. The problem had been explained
    D. Although the problem had been explained

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    ____several times，but unfortunately，the boy still couldn’t smooth away the problem on his own.


    1. A.
      Having been explained
    2. B.
      The problem having been explained
    3. C.
      The problem had been explained
    4. D.
      Although the problem had been explained

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    ____several times，but unfortunately，the boy still couldn’t smooth away the problem on his own.

    A.Having been explained            B.The problem having been explained

    C.The problem had been explained     D.Although the problem had been explained

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    _____several times，but unfortunately，the boy still couldn’t smooth away the problem on his own.

    A.Having been explained                B.The problem having been explained

    C.The problem had been explained        D.Although the problem had been explained

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