1.   A burning, thick discharge like cream, especially if it occurs at the time of the monthly period.

2.   A radiation leak occurred at a Russian nuclear power station.

3.   A similar pattern occurred at Peterborough.

4.   Among the most serious incidents occurred at a University of Rhode Island fraternity.

5.   An robbery attempt occurred at gunpoint.

6.   As a result, social contacts were mainly peripheral, or occurred at formal social occasions.

7.   As most of the ward learning occurs at the bedside, full discussion of the patient and his treatment provides another problem.

8.   Bacterial and fungal infections almost always occur at the site of an earlier wound.

9.   But the most brutal episode occurred at the Cite Herault, a residential suburb.