look them 中间是?

look them 中间是? 是look after them,还是look them after? look them look at them 为什么用them ,一般动词后面不是才能用them,look at 是词组呀 Plase look after them. cut them up为什么them放中间 look them up还是look it up Please____(look)after them carefully. 高中英语题look them up 和look up them 有什么区别,还是有一个是错的?我听说什么句子里用代词和用 You have no idea what the faces behind them look like.这是一个什么 what do your parents look like?describe them这是初一下册的一个作文题 yes,there is someone.(look )after them