21.   Then the pigeons flew into thick fog, and the famous homing instinct failed.

22.   Thick fog can disorient even an experienced hiker.

23.   The valley was engulfed in a thick fog.

24.   Goodness knows what was happening to her, but she seemed to be trapped in some thick mental fog.

25.   Last February a woman died in a pileup involving eighty cars in thick fog.

26.   The accident happened last night in thick fog on the M-forty.

27.   One person has been hurt and several others injured in a multiple crash involving five vehicles in thick fog.

28.   A woman whose husband was killed in a motorway pile-up in thick fog is claiming compensation from two other motorists involved.

29.   A woman whose husband was killed in a motorway pile-up in thick fog is taking legal action against two other motorists involved in the crash.

30.   Four people have been injured in an accident in thick fog.