I have art lesson on the afternoon of Tuesday.为什么用on?

I have art lesson on the afternoon of Tuesday.为什么用on? 1.I have( )art lesson after math on Tuesday. 2.We sell our c I have English the afternoon of Tuesday A.in B.for C.on We have Art ______the morning of Tuesday?为什么标准答案用的是on? i have art on tuesday.的中文是什么 what lessons do they have----tuesday afternoon?填on,为什么 I have an Art lesson on Monday 改一般疑问句 who always have art on tuesday找错 1.They have an art lesson ------ Friday afternoon.A.in B.on （）the afternoon of this Tuesday用in还是用on on Tuesday afternoon I have on class on Tuesday mornings.