8年级数学上册知识点:a group of 和 a crowd of 有什么区别

a group of是什么意思? a group of 和 a crowd of 有什么区别 controlling group of a number of companies A GROUP OF 变复数怎么变 A GROUP OF BIE MICE 中的OF表示什么意思 There was/ were a group of wolves. Was or were? Y? 'a group of sth.'前或后的动词用单数还是复数！ 'a group of sth.'前或后的动词用单数还是复数！ The Greenwood Boys are a group of pop singers哪儿可以连读，请说明 There are only two boy___this group.A in B on C of D among