31.   Secret Service agents led dogs through the stands to sniff for explosives.

32.   Security officers at the San Francisco International Airport are using a computerized canine to sniff for explosives inside luggage.

33.   Several large thrifts have been sniffing about for buyout offers.

34.   She invites skeptics to come and sniff for themselves.

35.   Sniffing for such gas is to be a main job of atmospheric surveillance.

36.   That argument will rage, no doubt, once the Olympics end ... and the Nagano police dogs finish sniffing for leftovers.

37.   The air is full of noses sniffing for rats.

38.   The big, bad wolf came snout to nose with the students, sniffing around for a little fear.

39.   The dogs sniff for explosives, and occasionally nip a visitor.

40.   The fish were periodically removed, rinsed with water, checked for color changes and sniffed for signs of decay.