L want to see the TV play,but l don't know which channel____

问题描述:

L want to see the TV play,but l don't know which channel____
a is it ;b it is ; c is it on ; d it is on
把结构给我说下、以便下次遇到、

选 b 吧应该.
你把意思理解了就应该 会选对吧