题目

 About_______of the students in our class were born in the                .A. two-thirds, 1990s    B. two-thirds, 1990       C. two-third, 1990s 答案：A 【解析】数词的考查。分数的分子用基数词，分母为序数词。分子不是一的，分母序数词加S。表示年代的要在后面加“s”。故选A。

查看本题答案和解析