Question

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.
С объяснением срочно!!

Answer 1

1. Talked.
2. Going.
3. Have.
4.Studied
5. Have.
6 Walked.
Объяснение: в 1 уже есть глагол have. Во 2 уже есть частица has. В 3 уже есть глагол cleaning. В 4 уже есть частица has. В 5 уже есть глагол working. В 6 прошедшее время, нужен глагол с ed окончанием, т.е. Walked.

Не за что)