21.   They all sat around the camp fire, singing songs.

22.   They are grouped around radios, singing samba songs.

23.   They sang songs to keep up their morale until the rescuers arrived.

24.   They sat round with guitars, singing songs.

25.   They sat together and sang songs.

26.   We sang songs around the campfire.

27.   When insulted, they stripped to the waist, put on hideous driftwood masks and sang nasty songs at each other.

28.   Would-be lovebirds are unable to hear the love songs sung by other birds.

29.   He sings each song twice over.

30.   The song is sung to the tune of Colonel Bogey.