21.   The smell of burning buildings from the last flare-up still filled the air.

22.   The smell of couscous and other grain which filled the air constantly reminded me of my own situation.

23.   The smell of perfume filled the air.

24.   The sweet scent of incense filled the air.

25.   In the parking lot of the school, the siren filled the air.

26.   The sounds of tango filled the air.

27.   A tantalising aroma of roast beef fills the air.

28.   The air is filled with birdsong.

29.   A delicious smell filled the air.

30.   Bits of pulverized rock filled the air.