是on free time 还是in free time

是on free time 还是in free time free time 前用ON还是IN? free time 前用ON还是IN? “在你的空闲时间里”用英语怎么说?是in your free time还是on your free time .free time填介词,用in还是on? at my free time 还是on my free time 用英语怎么说“在空闲时间”是用“in free time’还是“at free time”？ teenagers like playing cards for f ()　in their free time on computers中间填什么 Stacey spends all her free time _____ making music.用in?用on?还是用with? 是in the day time还是on the day time in the free time与on the free time的区别急 my free time前用何介词(on?in?by?) 在工作中是in working time还是on还是用at, i like reading some novels for my free time 好还是in my free time 好 in one's free time还是 at one's free time 在早餐时间是用on breakfast time还是at breakfast time,还是in breakfast time? 是in the half-time 还是on the half-time 还是at 他和half time 是in the half-time 还是on the half-time还是at the half-time