The next he knew, someone was rapping on the door.

In my room, I'd just gone to bed when someone rapped on the door.

His two men moved forward and rapped on the door.

I got out of the car and rapped on the front door.

He rapped on the door, but there was no answer.

So saying, he raised his hand and began rapping on the door.

She rapped on his door and there was no answer.

Then I went up the steps and rapped on the door.

I took the steps two at a time to the second floor and rapped on his door.

We had soon reached the old lady's house and rapped on the door.