8．About_______ of workers in that steel factory are young people．（　�。�
A．third-fifthsB．three-fifthsC．three-fivesD．three-fifth

分析 那家鋼鐵廠的五分之三的工人都是年輕人．

解答 答案：B．
本句考查分?jǐn)?shù)的表達(dá)．對于分?jǐn)?shù)的使用要注意，分子用基數(shù)詞，分母用序數(shù)詞，當(dāng)分子大于一時(shí)，分母中的序數(shù)詞用復(fù)數(shù)形式；故選B．

點(diǎn)評 對于分?jǐn)?shù)的用法要識記一些常用短語，結(jié)合句意做出更明確的判斷．

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