Помогите, пожалуйста, задание в прикрепленном файле,,

II.
1. I was buying christmas presents when I met my classmate.
2. Mom was cooking supper when dad came home.
3. Linda was cutting bread when she hurt her finger.
4. When Nelly was sweeping the paths in the garden, she saw a squirrel.
5. The children were swimming in the river when the rain started.

III.
1. Nelly was singing a new song while the girls were listening to her.
2. We were playing games in the park while Sally was reading a book.
3. Tommy was climbing a tree while the children were watching him.
4. Ted was choosing a cd for dances while we were decorating the room.
5. I was watching a cartoon while Dannie was helping mum to bake a cake.