People have speculated for centuries about a future without work. Today is no different, with academics, writers, and activists once again (1)_____ that technology is replacing human workers. Some imagine that the coming work-free world will be defined by (2)_____. A few wealthy people will own all the capital, and the masses will struggle in an impoverished wasteland.

    A different and not mutually exclusive (3)_____ holds that the future will be a wasteland of a different sort, one (4)_____ by purposelessness: Without jobs to give their lives (5)_____, people will simply become lazy and depressed. (6)_____, today’s unemployed don’t seem to be having a great time. One Gallup poll found that 20 percent of Americans who have been unemployed for at least a year report having depression, double the rate for (7)_____ Americans. Also, some research suggests that the (8)_____ for rising rates of mortality, mental-health problems, and addiction (9)_____ poorly-educated, middle-aged people is a shortage of well-paid jobs. Perhaps this is why many (10)_____ the agonizing dullness of a jobless future.

    But it doesn’t (11)_____ follow from findings like these that a world without work would be filled with unease. Such visions are based on the (12)_____ of being unemployed in a society built on the concept of employment. In the (13)_____ of work, a society designed with other ends in mind could (14)_____ strikingly different circumstances for the future of labor and leisure. Today, the (15)_____ of work may be a bit overblown. “Many jobs are boring, degrading, unhealthy, and a waste of human potential,” says John Danaher, a lecturer at the National University of Ireland in Galway.

    These days, because leisure time is relatively (16)_____ for most workers, people use their free time to counterbalance the intellectual and emotional (17)_____ of their jobs. “When I come home from a hard day’s work, I often feel (18)_____,” Danaher says, adding, “In a world in which I don’t have to work, I might feel rather different”—perhaps different enough to throw himself (19)_____ a hobby or a passion project with the intensity usually reserved for (20)_____ matters.

答案精析：空格位于that引导的宾语从句中，从句句子主干为the for rising rates of…is shortage of well-paid jobs。通过语义判断，“未受良好教育的中年人出现的各种问题”与“缺少高薪工作”之间是因果关系，因此选择explanation（解释）。

错项排除：B项requirement (for)意为“要求”，表示实现某种事情的必备条件，填入空格处表示“患病率上升的条件是缺少高薪工作”，显然不符合原文，故排除。C项compensation (for)表示“对……补偿”，填入空格处表示“患病率上升的补偿是缺少高薪工作”，显然不符合逻辑，故排除。D项substitute (for)意为“替代”，前后应该为功能或作用类似的事物，但原文的rising rates和shortage of well-paid jobs显然不是同类的事物，故排除。