1. We played tennis yesterday. Half an hour after we began playing, it started to rain.
   We when .
2. I had arranged to meet Tom in a restaurant. I arrived and waited for him. After 20 minutes I suddenly realised that I was in the wrong restaurant.
   I for 20 minutes when I the wrong restaurant.
3. Sarah got a job in factory. Five years later the factory closed down.
   At the time the factory , Sarah there for five years.
4. I went to a concert last week. The orchestra began playing. After about ten minutes a man in the audience suddenly started shouting.
   The orchestra when .

This time make your own sentence:

5. I began walking along the road. I when .