1. Will that music never stop? It (play) for two hours. 2. Turn the TV set off. The children (watch) it since morning. 3. Mary is learning to play the piano. She (practice) since breakfast time. 4. He (live) in the USA for many years but he still can't speak English properly. 5. I need a holiday. I (work) too hard for a long time. 6. Please, wake up Peter. He (sleep) for ten hours.

1. Will that music never stop? It has been playing for two hours.
   (Present Perfect Continuous, действие началось в прошлом и продолжается до сих пор)
2. Turn the TV set off. The children have been watching it since morning.
   (Present Perfect Continuous, действие началось в прошлом и продолжается до сих пор)
3. Mary is learning to play the piano. She has been practicing since breakfast time.
   (Present Perfect Continuous, действие началось в прошлом и продолжается до сих пор)
4. He has lived in the USA for many years but he still can't speak English properly.
   (Present Perfect, результат действия важен в настоящем)
5. I need a holiday. I have been working too hard for a long time.
   (Present Perfect Continuous, действие началось в прошлом и продолжается до сих пор)
6. Please, wake up Peter. He has been sleeping for ten hours.
   (Present Perfect Continuous, действие началось в прошлом и продолжается до сих пор)

Ответ: См. решение