第3题: [单项选择]About ______ of the workers in that factory are young people. A. third--fifth B. three--fifths C. three--fives D. three--fifth 参考答案:B 答案解析:[分析] 测试点是数词的用法。three-fifths表示3/ 5,英语的分数表示法要求分母用序数词,分子用基数词。如果分子大于1那么表示分母的序数词要加 s。例如:1/3 one--third 2/