______ (use) economically, one tin of oil will last at least two months.Used分词的用

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问题 ______ (use) economically, one tin of oil will last at least two months.

选项

答案 Used

解析分词的用法。此题考查的是过去分词作状语。由于分词与主语是被动关系，所以使用过去分词。[例句] Given more attention，the trees could have grown better．假如多给些照顾，那些树会长得更好。

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