Complete the correct option 5 Sue WAS WASHING | WASHED the dishes when the phone rang.

The correct answer is WAS WASHING.
Explanation: The sentence describes an action in progress (Sue washing dishes) that was interrupted by another action (the phone rang). 'Was washing' is the past continuous tense and shows that the action of washing was ongoing when the phone rang. The phone rang in the middle of washing the dishes, so, we use the past continuous for washing dishes.