Past continuous and past simple
We ______ in the park when we ______ the fox. (walk / see)
We were walking in the park when we saw the fox.
They ________ in a cafe when he _______ her to marry him. (sit / ask)
They were sitting in a cafe when he asked her to marry him.
She ______ when her phone ______ . (wash up / ring)
She was washing up when her phone rang.