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    29．Nowhere in nature is aluminium (铝) found free, owing to its always with other elements, most commonly with oxygen. A．combined B．having combined C．combine D．being combined 解析:owing to 为介词短语.后接动名词短语作宾语.combine 与 aluminium 是被动关系.故用动名词的被动形式. 答案:D 【查看更多】

     

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    Nowhere in nature is aluminium (铝) found free, owing to (由于) its always  ____with other
    elements (元素) most commonly with oxygen.  
    [     ]
    A. combined    
    B. having combined 
    C. combine    
    D. being combined

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    Nowhere in nature is aluminium（铝）found free, owing to its always ______ with other elements, most commonly with oxygen.


    1. A.
      combined
    2. B.
      having combined
    3. C.
      combine
    4. D.
      being combined

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    Nowhere in nature is aluminium（铝）found free, owing to its always ______ with other elements, most commonly with oxygen.

    [　　]

    A．combined
    B．having combined
    C．combine
    D．being combined

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