The European Union countries were once worried that they would not have（）supplies of petroleum._精华吧

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

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

A.proficient

B.efficient

C.potential

D.sufficient

正确答案：sufficient

Tag：综合英语时间：2023-12-22 09:46:25

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