If I'm watching TV and the phone rings, then I choose to...
If I'm watching TV and the phone rings, then I choose to answer it. But if I'm at work and TV or radio is piped in, I have no choice but to listen to it.
If I'm watching TV and the phone rings, then I choose to answer it. But if I'm at work and TV or radio is piped in, I have no choice but to listen to it.