11.   A certain amount of violence occurred between supporters of Rauti and Fini.

12.   Before the meeting could take place, an incident occurred between two rival factions of Falangists, in which two Falangists were killed.

13.   In the phallic phase, which occurs between the ages of three and five, the principal erogenous zone becomes the genitals.

14.   Electrical signals occur between nerve cells as a result of special properties in the membrane of their axons and the synapses between neurones.

15.   Diffusion occurs between mutually soluble or miscible liquids.

16.   It does not occur between immiscible liquids.

17.   Equilibria which occur between physically distinct regions, that is between phases, are called heterogeneous equilibria or phase equilibria.

18.   Significantly more cases of cryptosporidiosis occurred between April and June and less cases were seen between October and December over the whole period of the study.

19.   Right so nearly ninety percent of all world trade right, occurs between developed countries.

20.   The initial impact occurs between the outer-arc ridge of the overriding continental margin and promontories on the leading edge of the continent entering the subduction zone.