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【单选题】

Nowhere in nature is aluminum found free,owing to its always with other elements,most
commonly with oxygen.
[ ]

A.
combined
B.
being combined
C.
combine
D.
having combined
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参考答案:
参考解析:
.
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【单选题】Don't put your books everywhere.Keep them.

A.
in place of
B.
out of place
C.
in place
D.
in the place
相关题目:
【单选题】Don't put your books everywhere.Keep them.
A.
in place of
B.
out of place
C.
in place
D.
in the place