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The European Union countries were once worried that they would not have ____ supplies of petroleum.

分类: 作业答案 • 2022-03-06 13:43:21

问题描述：

The European Union countries were once worried that they would not have ____ supplies of petroleum.
A) proficient B) efficient C) potential D) sufficient

答

D) sufficient

The European Union countries were once worried that they would not have ____ supplies of petroleum.

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