【題目】There are fifty students in this class, ________ of them are boys, so the number of the boys is 30.

A.three fifthB.three fifthsC.three five

【答案】B

【解析】

句意:班上有50名學(xué)生,五分之三是男生,因此男生的數(shù)量是30人。

考查分?jǐn)?shù)的表達(dá)。分?jǐn)?shù)是由基數(shù)詞和序數(shù)詞一起來表示的;鶖(shù)詞作分子,分子是three;序數(shù)詞作分母,除了分子是1以外,其他情況下序數(shù)詞都要用復(fù)數(shù)形式,此處分母用序數(shù)詞的復(fù)數(shù)fifths。故選B。

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