1.   A preliminary autopsy report showed he had a slightly enlarged heart, not unusual for an athlete.

2.   Demos to outsiders, if not an everyday occurrence, were not unusual.

3.   Disputes between natural and adoptive parents are not unusual and a fair proportion of arrangements break down.

4.   Even in England, half-inch diameter hail stones are not unusual.

5.   It is not unusual for control rooms to be located in another area.

6.   It is not unusual for new mothers to go to the doctor complaining of tiredness, lethargy, and mild depression.

7.   It is not unusual for royal cousins to intermarry.

8.   It is not unusual for this kind of person to carry home overtime work and to go to work on holidays.