摘要：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
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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.
elements (元素) most commonly with oxygen.
[ ]
A. combined
B. having combined
C. combine
D. being combined
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B. having combined
C. combine
D. being combined