11.   He gets his money back as soon as all the units are sold.

12.   In language the basic units are distinctive sounds and words.

13.   In many species the basic unit is the harem, with one dominant male surrounding himself with a number of breeding females.

14.   In practice, combat units were invariably understrength.

15.   My unit was in a large field covered mostly with elephant grass.

16.   On Standby the transponder unit is on, but does not give a response.

17.   Otherwise, his supply unit would be on the receiving end of a simulated bomb or Tomahawk cruise missile.

18.   Our unit was a general support artillery battalion.

19.   Powered by vacuum tubes, those old radar units are now dinosaurs.