________ have died for the liberation of China．A.Thousand and thousands of heroesB.Thousands of hundreds of herosC.Tens of thousands of herosD.Tens of thousands of heroes
网友回答
D解析hundred，thousand，million，dozen，score等表确定数目时，不必加-s；若表不定数目，则要加-s。如：several dozen eggs几打鸡蛋；some dozens of people几十个人；two score and five years ago 四十五年前。