Four of them are Americans.介词为什么用of

Four of them are Americans.介词为什么用of If four of them were 【英语翻译】how many of the four students like friends who are like them? Four of them are Americans.这里的American要加s吗?为什么? The class Four students are on the playground.Twenty of them are playing basketball,__are runninga.the restb.othersc.the othersd.some of them there are forty-four students in class a.twenty-three of()are girls A.their B.them C.they Some of them are 英语翻译Four ninths of the audience in the cinema today are men,two fifths of them are women and the rest are children. There are forty-four students in Class One.Nineteen of them are boys,___ are girls.the others 还是others 为什么? Ame AmE Here are four familys .Let's welcome them.改错 改错 These books are Jim's and kitty's.Each of than has four.这个 原题 看这个！上面有些地方打错啦！改错 These books are Jim and kitty's.Each of them has four. some of them are red.some of them are yellow. Here are some of them. Most of them are sweet. Many of them are family Four of the seven bodies are male and three female,one of them a flight attendant.是啥结构啊?是不是省略了部分结构?比如：{Four of the seven bodies are male andthree （of the seven bodies are）female,one of them （is）a flight att