a dozen eggs 是复数还是单数

a dozen eggs 是复数还是单数 a dozen of eggs 就是一打鸡蛋,二十个,按单数还是复数处理呢? 一打鸡蛋 是a dozen of eggs还是a dozen eggs? a score of eggs 谓语用单数还是复数 dozen of和score of后面的名词是单数还是复数 a basket of eggs作主语谓语动词用单数还是复数 a few of是单数还是复数 A and B是单数还是复数 请问In this supermarket,eggs are sold ___ 是用by dozen还是by the d family是单数还是复数 school是单数还是复数? cookie是单数还是复数