21.   Equally, concepts, the stuff of rules, can not exist in a vacuum as mere semantic toys.

22.   Even the best examples of habitat types can not exist in isolation like islands of richness in a sea of poverty.

23.   Extreme poverty still exists in many rural areas.

24.   For example, it has often been suggested that distinctive working-class and middle-class subcultures exist in Western industrial societies.

25.   For the foreseeable future, occupational pension provision is likely to exist in some form.

26.   For the refugees, home exists only in their imagination.

27.   Having made this assessment, the Marketer should be aware of the potential problems which exist in communication within different cultures.

28.   He emphasises the actual similarities in the pattern of bargaining despite the differences which exist in the formal structures.

29.   High-speed trains operating on magnetic levitation exist in experimental form only.