21.   The door was opened before she could ring the bell.

22.   She huddled inside the porch as she rang the bell.

23.   They stood together on the stoop and rang the bell.

24.   At the specified time, we rang the bell.

25.   He rings the bell.

26.   I rang the bell and was not surprised to see that Hugh was still as fat as ever.

27.   The Vice-Admiral lived at the back, and he opened his front door a few seconds after Pooley rang the bell.

28.   The bell was rung several times.

29.   He rang the bell and it was answered by a youngish woman wearing a blue overall.

30.   For a moment I think I might walk up the steps and ring the bell.