1.   He wore a shapeless gray cap and arrived in a sputtering old Model knocked at the door asking if Walton was there.

2.   Hencke heard one canister bounce off the outer hull with a dull echo like the Devil knocking at the door.

3.   I could see figures moving in the kitchen and I knocked at the side door.

4.   I heard someone knocking at the front door.

5.   Later, during a frightful storm, a princess knocked at the castle door, begging for shelter.

6.   Most of them were well gone in their cups and offered no objection when Cranston knocked at the door and demanded entrance.

7.   People knocking at the door was a very unusual event in this household.

8.   The poor, sick, bereaved, came knocking at the door.

9.   We arrived at his house and knocked at the door.

10.   We knocked at the door but there was no one there.