[填空题] Life-style is the way a person lives work, leisure time, hobbies, other interests, and personal philosophy. One’’s personal life-style may be (36)_________ work, including few social activities. Another’’s may involve hobbies, (37)_________activities, or personal philosophy. There is little doubt that life-styles are changing and that these changes will have an (38)_________on the way business operates in the years (39)_________. Several factors are causing life-style changes in U. S. society. First, there is more leisure time than ever before. The workweek is now less than forty hours, as (40)_________to seventy hours a century ago. Some (41)_________believe it will be twenty-five hours or less before the year 2000. Several firms have (42)_________four-day workweeks with more hours per day. Others have cut the number of hours worked each week. Reduced work (43)_________ mean increased leisure time. Second, families have fewer children than before—(44)___________