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  3. It turns out that a good night’s rest is good for business. One-third of American workers aren’t sleeping enough to function

It turns out that a good night’s rest is good for business. One-third of American workers aren’t sleeping enough to function

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问题     It turns out that a good night’s rest is good for business.
    One-third of American workers aren’t sleeping enough to function at【C1】______levels, and that chronic exhaustion is costing billions of dollars in lost【C2】______, according to researchers from Harvard Medical School. The Centers for Disease Control and Prevention【C3】______40.6 million American workers, or 30% of the【C4】______workforce, don’t get enough rest. People【C5】______up for work but operating at low levels. A 2012 University of Southern California study of young investment bankers suggested that punishing hours【C6】______to physical and emotional ailments(疾病)within four years on the job. The risks of【C7】______in professions like health care and manufacturing are especially【C8】______, which involve overnight shifts and【C9】______a single careless error can put lives【C10】______danger.
    More and more managers are【C11】______convinced of the importance of sleep. They are【C12】______up to the problem of sleep deprivation,【C13】______in sleep-hygiene(卫生)programs and struggle to【C14】______exhausted workers. "Nowadays, the line between work and what’s outside of work is【C15】______. But if we treated machinery like we treat the human body, there would be【C16】______all the time," said James Maas, a former Cornell University psychologist. "People in investment banking have been my main【C17】______for the last few years because they’re so【C18】______and under so much pressure," said Mr. Maas, adding that bankers【C19】______don’t want to hear about how to get more sleep. Instead, they want【C20】______for performing well on five or six hours’ rest.
【C13】
选项 A、suggesting
B、investing
C、submerging
D、investigating
答案B
解析 动词辨义题。根据前面提到“越来越多的企业开始逐渐意识到缺乏睡眠这个问题”，可知此处是说“这些企业花钱投资了睡眠卫生课程项目”，因此invest“投资”符合文意。suggest“提议，建议”；submerge“淹没，浸入，沉浸”；investigate“调查，研究”，均不符合文意，故排除。
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大学英语四级

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