以one/body结尾的复合不定代词作主语时，反义疑问句的主语用they或he都可以。如 Everyone is busy, aren't they? Everyone is busy, isn't he?希望我的回答能够帮到你，望采纳！祝你学习进步，天天快乐。O(∩_∩)O
既可以用单数he/she也可以用复数they，一般用复数they
