11.   If this fault occurs during typesetting it should have been eliminated at the proof reading stage.

12.   It is especially important that no breaks in the skin occur during shaving as these act as routes for bacteria to enter.

13.   It was middle classes who were the major beneficiaries of the economic and social changes which occurred during the inter-war years.

14.   Minor clashes between police and demonstrators occurred during a protest rally.

15.   People were shocked by the wanton destruction that occurred during the riots.

16.   Scientists are concerned that a special event, such as a sunspot or supernova might occur during this long period of communications blackout.

17.   Such conditions generally occur during periods of very high interest rates.

18.   The robberies usually occur during daylight hours.

19.   This is precisely the process that occurs during a two-pass load, as the synonyms are stored on the second pass.