1 Was he playing with his sister all day yesterday?
2 Did Andy write a letter to his friend yesterday?
3 When Pete was running in the park, he lost his mobile phone.
4 I saw Mike when he was crossing the street.
5 We were playing badminton while Sam was swimming in the river.
6 When grandpa was reading his newspaper, the postman came.
7 What were you doing at three o'clock yesterday?
8 Mum was cooking dinner when Ben was doing homework.
9 After supper she washed the dishes, read books and then went to bed.
