21.   It is difficult to judge progress on the basis of a single day.

22.   It is expensive and difficult to fire employees.

23.   It is not an attractive proposition for independent power generation because it is difficult to finance.

24.   It is sometimes difficult to fet the right combination of storage and hanging space.

25.   Many SMEs find it difficult to access technology and often do not appreciate how they might benefit from it.

26.   New managers often find it difficult to delegate.

27.   New terminologies were not difficult to master, and gradually the possibility of perfection began edging its way into my life.

28.   On the international front, its diplomats are tight-lipped and difficult to approach.

29.   Once they start eating on a piece of wood, however, they can get a little more difficult to spot.

30.   One answer, of course, is that it is easy to measure hours and difficult to measure productivity.