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Nowhere in nature is aluminum found free, owing to its always______with other el
Nowhere in nature is aluminum found free, owing to its always______with other el
游客
2025-04-18
18
管理
问题
Nowhere in nature is aluminum found free, owing to its always______with other elements, most commonly with oxygen.
选项
A、combine
B、combined
C、being combined
D、having combined
答案
C
解析
owing to是介词短语,后面应跟名词或动名词,its being combined with otherelements为动名词短语。其他三个选项均不合适,因为combine为原形动词;combined为过去分词;having combined为主动态。
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