8 When Dad came, Mum (cook) a special dinner for the family party while I (decorate) the living room.

8 When Dad came, Mum (cook) a special dinner for the family party while I (decorate) the living room.

В данном случае необходимо использовать Past Continuous для обоих глаголов, так как оба действия происходили одновременно в прошлом.

Правильные ответы:

1. When Dad came, Mum was cooking a special dinner for the family party while I was decorating the living room.

Ответ:

1. Mum was cooking a special dinner for the family party while I was decorating the living room.