1. was shopping / happened
2. wasn't / arrived
3. was waiting / approached
4. showed
5. asked / had
6. left / was paying
2. While my dad was driving home from work, his car suddenly stopped.
My dad was driving home from work when his car suddenly stopped.
3. While Alex was walking home from school, it started raining.
Alex was walking home from school when it started raining.
4. While she was waiting at the bus stop, we saw our Maths teacher.
She was waiting at the bus stop when we saw our Maths teacher.
5. While my mum was reading a book in the living room, my brother entered the room.
My mum was reading a book when my brother entered the room.
