21.   Discontent has been spreading in southeastern Nigeria, where the oil is produced but which has been badly neglected by the northern military rulers.

22.   English lavender makes the highest-quality essential oil, but Lavendin produces more oil and is prettier than the rather gray English lavender.

23.   He bought Surgut shares because it can produce oil faster and deliver it cheaper.

24.   He is experimenting with producing quality oil for cosmetics, and he would like to see more seal leather goods made.

25.   He has worked in most places where oil is produced, always playing a role similar to the one he fills here.

26.   Heating oil is produced as part of the refining process for gasoline.

27.   He said the proper way to address high prices was to pressure the Organization of Petroleum Exporting Countries into producing more oil.

28.   Heating would produce more oil, of lesser quality.

29.   If individual members cheat and produce more oil, there could be another glut.

30.   If America produced more oil than it could use, domestic prices still would be determined by the global market.