【題目】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:據(jù)說,自從澳大利亞的森林大火開始以來,大約有三分之一的考拉已經(jīng)死亡。

考查分?jǐn)?shù)表達(dá)。one基數(shù)詞,一;three基數(shù)詞,三;first序數(shù)詞,第一;third序數(shù)詞,第三。表達(dá)分?jǐn)?shù)時(shí),分子為基數(shù)詞,分母為序數(shù)詞,所以只有one third正確,one third表示“三分之一”。故選C。

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