Вопрос по английскому языку:

#1. Underline the correct form.

1. They have talked/have been talking about it all morning.
2. He's not here because he has been going/has gone to work. He'll be back at 4 o'clock.
3. The children cleaned/have been cleaning the playground yesterday.
4. She has studled/has been studying all day.
5. I worked/have benn working without a break since 8 o'clock
6. I have been walking/walked to the park last week