one's free time前面介词是什么?

one's free time前面介词是什么? free time的前面应该用什么介词? in one's free time造句 in one's free time的中文 in one's free time还是 at one's free time 怎样用spend all one's free time with sb造句 in one’s free time的同义句 in one's free Spoil one's free in one is free time 中的time需加s吗 one's leisure _____ one's leisure time 有什么区别?____ one's spare timeone's leisure _____ one's leisure time 有什么区别?____ one's spare time _____ one's free time我看到有的是全at,有的是in one's spare time,那么 at one's free ti In one's free/spare one's leisure _____ one's leisure time 有什么区别?____ one's spare time _____one's leisure _____ one's leisure time 有什么区别?____ one's spare time _____ one's free time我看到有的是全at,有的是in one's spare time,那么 at one's f be free have time in one is free timebe free have time in one is free time one time用什么介词 .Most of us want to know your _________(one’s regular business for one’s free time for fun). People enjoy doing in one's free time请帮我解释一下谢谢 free time activities为什么不是free time's activities?