11.   A rapid buildup of carbon dioxide in the blood sets off alarms in the brain so conscious breathing can take over.

12.   A silk sweater in turquoise sets off a black or navy suit, while a hot-pink leather jacket moves black or gray separates into spring.

13.   After anti-immigrant sentiment in southern Spain set off rioting last year, the government has begun cracking down on Spanish citizens who help the immigrants.

14.   But the bid set off tensions within the exile community.

15.   But Tora usually ends up quarreling with his relatives and sets off to some picturesque corner of Japan.

16.   During the outcry the officers, their lawyers and law-enforcement officials have remained silent about what set off the shooting.

17.   For normal investors, such a large decline in value would have long since set off margin calls that forced them to liquidate their positions.

18.   Friday marked one month to the day since the Mexican government set off the current economic crisis by devaluing the peso.

19.   His zeal to get a bill approved set off a stampede.

20.   Hundreds of students and faculty clambered for the exits while others hid as the pair sprayed gunfire at lockers and hallways and set off the bombs.