1.oftheworkhasbeendone.A.Two-thirdB.TwothreeC.Two-thirds2.Thereweretwowordwarsduringcentury.A.thetwentiesB.thetwentiethC.twentieth

Question

1.____ of the work has been done.
A.Two-third B.Two three C.Two-thirds
2.There were two word wars during ____ century.
A.the twenties B.the twentieth C.twentieth

Answer 1

C 分数构成 分子为基数词即one two three····· 分母用序数词即first second third··· 当分子大于一 分母后要加s 如题中的Two-thirds（中间加不加连词线都对）
B 一般特定名词前要加定冠词 20世纪即是第二十世纪,所以要用序数词 故选B.the twentieth 当然楼楼也可记住世纪就是这么表示的