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.
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.