21.  A cat chasing its own tail.

22.  A cause has a power to produce its effect.

23.  A chick knows how to break out of its egg.

24.  A child under the age of ten cannot face criminal liability for its acts.

25.  A cigarette between his girlish lips seemed to be emitting smoke of its own accord.

26.  A civilization generally refuses to accept a cultural innovation that calls in question one of its own structural elements.

27.  A civilized society should treat its elderly members well.

28.  A class in County Down has a Presbyterian parson among its pupils.

29.  A cold grey light made its way round the corners of the curtains and trickled into the room.

30.  A cold, bitter wind blows through the branches, its whistling filled with the cries of tormented souls.