She rapped sharply on the old lady's door, and went in.

Then he rapped sharply on the door, two hard and one soft.

When there was no answer, he took out his night stick and rapped sharply with the end of that.

He walked over to the door and rapped on it sharply.

Then he rapped sharply on the door and opened it four inches.

He rapped sharply on the door, then pushed it open slightly.

His hand rapped sharply against what felt like exposed stone.

He reached across the door with the back of his right hand and rapped sharply.

Someone rapped sharply on the other side of the door.

He turned and rapped sharply on the door of No. 6.