1 I got to the cafe. My friends were waiting for me. (when)
When I got to the cafe, my friends were waiting for me
2 We fell asleep. We were watching a film. (while)
We fell asleep while we were watching a film
3 The car began to make a strange noise. I was driving home. (when)
when the car began to make a strange noise I was driving home 
 4 I met Joe yesterday afternoon. She was working in a clothes shop. (while)
I met Joe yesterday afternoon while She was working in a clothes shop 
 5 Ann learnt Italian. She was living in Rome. (when)
Ann learnt Italian when she was living in Rome

1. when i got to the cafe, my friends were waiting for me.
2.  We fell asleep while we were watching a film.
3. When the car began to make a strange noise, I was driving home. 
4.  I met Joe yesterday afternoon while she was working in a clothes shop.
5. When Ann learnt Italian, she was living in Rome.