Question

We're having a party tonight: my mum and sister have cooked/been cooking all day long​

Answer 1

Ответ:

We're having a party tonight: my mum and sister have been cooking all day long​

Объяснение:

Present Perfect Continuous используется для подчеркивания длительности действия, которое началось в прошлом и продолжается до сих пор.

Answer 2

We're having a party tonight: my mum and sister have been cooking all day long