ROUND UP » Стр.110 (d)

D. Complete with the Past Simple or the Past Progressive of the verbs in brackets. 1. As Kelly was cleaning the bird cage, her parrot escaped. 2. While I was sitting on a branch in a tree, it broke and I fell. Luckily, I didn’t break anything. 3. As soon as Mrs Mackenzie saw the snake in the classroom, she screamed.