可以
them 是they 的宾格形式,是代替复数名词.
是代替同一句子中的或前文提到的复数名词都可以.
My mother tacked the sleeves on before sewing them.我妈妈在把袖子缝好之前,先用大针脚把它缝好.She put the sugar into the coffee and mixed them up with a spoon.她把糖放进咖啡里,用勺子把它们混合起来.This comedy has had them rolling in the aisles for two weeks.这出喜剧让观众们连续两个星期乐得前仰后合.Let's go visit them.让我们去拜访他们吧.