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【题目】It is said that about ________of the koalas have been dead since the Australian wildfires began.

A.one threeB.first thirdC.one third

【答案】C

【解析】

句意:据说,自从澳大利亚的森林大火开始以来,大约有三分之一的考拉已经死亡。

考查分数表达。one基数词,一;three基数词,三;first序数词,第一;third序数词,第三。表达分数时,分子为基数词,分母为序数词,所以只有one third正确,one third表示“三分之一”。故选C

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