Question

Some people just don't know how to have fun -----(spend) their free time 英语填空

Answer 1

填 spending

Some people just don't know how to have fun spending their free time.
有些人就是不知如何才能快乐地度过他们的闲暇时间。

have fun doing: 做有趣的事情 ;做某事获得快乐 ;有趣做某事

若有疑问及时追问，满意敬请采纳，O(∩_∩)O谢谢~~

Answer 2

spending
have fun (in) doing sth. 做某事有趣。此处省去介词 in