1.   A short while later, the doorbell rang.

2.   At that very moment, the doorbell rang.

3.   Exactly half an hour later, my doorbell rang.

4.   He was talking on the telephone when the doorbell rang.

5.   Mark was about to open a beer when the doorbell rang.

6.   On the chilly winter afternoon when I was at Casa Dono di Maria, the doorbell rang.

7.   We had just finished our evening meal when the doorbell rang.

8.   When the doorbell rang he was ready and waiting.