There are two score of birds in the forest.为什么of后面用复数形式呢?

there are two score of people waiting outside. There are two score of birds in the forest.为什么of后面用复数形式呢? The score is two to five.为什么不是are呢? 【There are two _____ of people waiting outside】A.score B.dozens这两个词到底有什么区别 是怎么修饰的 There are two _ of people waiting outside.A dozen B score C dozens D scores四个都分析下谢谢 不懂就别答 别不懂装懂 寻老师啊 there are some 还是there are two two score of birds two score of 的score是什么意思 ACM博弈问题,求给思路Problem DescriptionAliceand Bob are playing a game.There are two piles of cards.There are N cards in each pile,and each card has a score.They take turns to pick up the top or bottom card from either pile,and the score of t there are two bears o-- there two score of people 还是two score people two score of 和two score 的 区别 英文翻译：There are same two.和 There are fifty. There are 3 ___ of people waiting outside .A dozen B score C dozens D scores there are two kinds of memory there are two chairs and a desk There are two farmers ( ) the apple trees There are two pictures ) the wall