■ radio

作为从听众角度使用的一种大众媒体，radio, cinema 和 theatre 都要带定冠词。

• I always listen to the radio while I'm driving.我总是一边开车一边听广播。
• It was a song that had been on the radio a lot that winter.那是一首那年冬天常常广播的歌曲。
• It was a great treat to go to the cinema or the theatre when I was a child.我小时候，去看电影或者看演戏就是一件大喜事。

但是 television（或 TV）习惯不带 the。

• What's on TV?电视有什么节目吗？

另一方面，这些大众媒体，如果从专业或从业人员的角度来谈及（相当于中文的“广播事业”、“电影事业”、“戏剧事业”等），就通常不带定冠词。

• Cinema is different from theatre in several ways.电影在几个方面同戏剧不同。
• He's worked in radio and television all his life.他干广播电视事业干了一辈子。