21.   But shortly afterward, Congress ordered the bureau to stop work on ways to trace explosives.

22.   But the appellate court said it wanted the work stopped while it reconsidered its own ruling.

23.   Carrigan had stopped work on that idea after learning it would be illegal.

24.   Citizens of Seattle stopped their work and rushed to the posts, as they had practiced in air-raid drills.

25.   Contractors who are pouring concrete slabs or filling in dirt had to stop work this week.

26.   Construction is nearly completed, and the builder said recently that no one had told him to stop work.

27.   Construction workers at the site complained that they had stopped work because of bad concrete.

28.   Despite these scenarios, scientists cannot bring themselves to say that they would voluntarily stop their work.

29.   Despite an influx of funds from abroad, several laboratories unable to pay their utility bills had been forced to stop work.

30.   David Bary, an EPA regional spokesman in Dallas, said work was stopped because the Delatte cleanup was about to enter its most expensive stage.