填空题

In recent years many countries of the world have been (36)_____with the problem of how to make their workers more (37) _____. Some experts (38_____the answer is to make jobs more varied. But do more varied jobs lead to greater productivity There is (39) _____to suggest that while (40) _____certainly makes the worker’’s life more (41) _____, it does not actually make him work harder. As far as increasing productivity is (42) _____, if variety is not an important (43) _____, then to what extent does more money lead to greater productivity The workers themselves certainly think this is important. (44)_____________. Money just lets them enjoy their spare time more. (45)______________. Perhaps if we succeed in making their jobs more interesting, (46)________________.