【題目】The math teacher was so happy because _________ of the students worked out that difficult problem.

A.four fifthB.four fiveC.fourth fifthsD.four fifths

【答案】D

【解析】

句意:這位數(shù)學(xué)老師很高興,因?yàn)槲宸种牡膶W(xué)生做出了那道難題。

考查分?jǐn)?shù)的表達(dá)方式。分?jǐn)?shù)表達(dá)方式:分子基數(shù)詞,分母序數(shù)詞,分子大于1,分母變復(fù)數(shù)。D項(xiàng)表述正確。故選D

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