a group of用法

a group of用法 a group of 的用法. a troop of 和a group of 的用法区别 a group of people 为什么用of 固定用法么 . a group of one of a group of a group of的用法,接名词可数还是不可数／请造句 there 'll be 6 of us in the group; of在这儿是怎么个用法?a basket of a a group of man 还是a group of men a group of enemies or ,a group of enemy a group of classmates是什么意思 a special group of doctors