spend与it 介词

spend与it 介词 spend on与spend in doing区别 spend.on spend.in 与spend.doing的区别 It takes sb some time to do sth与Sb spend some time in doing spend time doing 其中省略了那个介词? spend 与take 的区别 spend与cost的区别 spend与take的区别? spend用法与节构 How does it (giraffe) spend winter? spend on 与 spend in有什么区别? spend on与spend doing的区别和用法?