in the spare time /on the spare time哪个对?

问题描述:

in the spare time /on the spare time哪个对?

the spare time: 在闲暇时间 ;在业余时间
in the spare time: 业余

in the spare time 对,在空闲的时间
He usually reads books in his spare time.他经常在空闲时间看小说.都这样说.