31.   ReplayTV is more difficult to hack because it uses a proprietary operating system.

32.   She also pronounced the film among the most difficult to use.

33.   She hesitated on the stairs, knowing it would be difficult to sleep - then went down to the kitchen.

34.   Start with front man Pauly Fuemana, a New Zealander whose vocal style is almost as difficult to place as his accent.

35.   Such a possibility should be considered in all patients with unstable asthma that is difficult to control with conventional treatment.

36.   Such a powerbase is potentially much more difficult to change in the interests of a small discriminated-against group.

37.   The attitudes of adults to the mentally handicapped tend to be firmly entrenched, and difficult to change.

38.   The Black Orcs were the most difficult to defeat, because they were so warlike and determined.

39.   The boxes were bulky and difficult to move.