There are three nationwide television networks in the United States： the American Broadcasting Company（ABC）， the Columbia Broadcasting Company（CBS） and the National Broadcasting Company（NBC）。 There is also a public broadcasting network（PBS）， and there are hundreds of local television stations. In many areas television is broadcast 24 hours a day.
1.A： Is there anything worth watching on another channel？
B： I think there's a western on.
A： Do you mind if we watch it？ I'd really like to see it.
B： Well， I really wanted to see the baseball game.
2.A： Do you happen to know what's on after the news？
B： I've got a feeling there's a documentary about animals.
A： Does anybody mind if we watch it？
B： Don't you want to see part two of the movie？
3.A： Do you remember what comes on next？
B： I believe there's a TV special.
A： Are you interested in watching it？
B： Let me look in the TV Guide first.
4.A： What's on Channerl 2 at 8：00？
B： If I remember correctly， there's a quiz show.
A： Do you want to watch it？
B： Let's see what else is on first.