百科知识

教育/科学

模拟卷6-31Oilafossilfuel-over

2009-05-11 21:22:25b***
Oilafossilfuel_______overmillionsof oughttohavebeenformed请详细写出解题的过程和思路。模拟卷6-31Oilafossilfuel_______overmillionsofoughttohavebeenformed请详细写出解题的过程和思路。：D对?

最佳回答

  • D对。这里是过去分词thought做定语，后面的remain是整个句子的谓语动词。即：Oil a fossil fuel THOUGHT TO HAVE BEEN FORMED over millions of years from decayed plant and animal REMAINS buried under thick layers of rock.
    2009-05-13 06:42:05
  • 选c;be thought to have been done;;据认为；这里因为发生在过去要用完成时，且要用被动语态； 所以用不定式的完成被动式。
    2009-05-11 22:19:18
    • 很赞哦！ (105)

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