The world's supplies of copper（）A、have gradually being exhaustedB、are gradually exhaustedC、has been gradually exhausted D、are being gradually exhausted - 搜题匠

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题目内容(请给出正确答案)

The world's supplies of copper（）

A、have gradually being exhausted
B、are gradually exhausted
C、has been gradually exhausted
D、are being gradually exhausted

参考答案和解析

正确答案:D

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