1. I caught that cold when I was
skating on a frosty day.
2. He wrote those nice poems when he
was having a holiday.
3. She learnt the language when she was
living in England.
4. She heard that song when she was
listening to a concert on the radio.
5. I bought that book when I was
reading up for my exams.
6. The boy hurt himself when he was
riding the bicycle.
7. Philip lost his camera when he was
walking about the city.
8. He rang you up when he was having
supper.