11.   As she sieved the contents of two cans of tomatoes, Penry returned, sniffing the air.

12.   The murderer came out and sniffed the air temporarily.

13.   Anxiously sniffing the air, Lisa takes a tentative step up the mountainous blue ramp in front of her.

14.   At that I sit up and sniff the air.

15.   Before leaving I scanned the sky to the horizon for telltale smoke, and sniffed the air for any hint of what might not be seen.

16.   All one needs to do to verify that is to sniff the air.

17.   He can sniff the air out.

18.   His followers have sniffed the air and determined the time is right to press their theocratic agenda.

19.   I hunt with my eyes and ears, even sniffing the air, and my mind is clear and attentive.

20.   Later, the female came onto a trail sniffing the air and looking around, as if searching for Carney.