Make sentences using the Past Simple and the Past Continuous. Use while or when.

2 I didn't meet my old friend while I was staying in Prague.

3 She walked into a tree while she was talking on her mobile phone.

4 He lost his wallet while he was shopping.

5 We were driving home when we ran out of petrol.

6 He broke the key while he was trying to open the door.

7 We weren't swimming when we heard the screams.