21.   Are the hard hats necessary for people who fall on snow, they argue, as opposed to bicyclists who tend to crash on pavement?

22.   As his corpse was carried away, rescue workers doffed their grimy hard hats while others snapped to salute.

23.   As the truckdriver waited, men in hard hats worked at the far end of the plant to almost double its storage and crushing capacity.

24.   At Newark you get hard hats and steel toes, fitting gear for the New York region.

25.   Bob works four stick-like levers and two brake pedals, a puppeteer in a hard hat.

26.   Boxes filled with hard hats and goggles sit in the school entrance hallway.

27.   A bunch of guys who could just as easily stand out there in hard hats as they do in batting helmets.

28.   A hard hat came soaring through the air and smacked Costello in the face.

29.   A collection of hard hats with stickers on them adorned the wall near us.

30.   A hard hat is on a nearby shelf.