[填空题]American society is not nap-friendly. In fact, there’s even a{{U}} (36) {{/U}}against admitting we need sleep. Nobody wants to be caught napping or found asleep at the Switch. To quote an{{U}} (37) {{/U}} proverb: "Some sleep five hours, nature requires seven, laziness nine and{{U}} (38) {{/U}}eleven." Wrong. The way not to fall a sleep at the switch is to take naps when you need them. "We have to{{U}} (39) {{/U}}change our attitude toward napping," says Dr. William Dement of Stanford University, the{{U}} (40) {{/U}}of sleep research. Last year a national commission led by Dement{{U}} (41) {{/U}}an "American sleep debt," which one member said was as important as the national debt. The commission was concerned about the dangers of{{U}} (42) {{/U}}: people causing industrial accidents or falling asleep while driving. About 60 percent of American{{U}} (43) {{/U}}nap when given the opportunity.{{U}} (44) {{/U}} Clearly, we were born to nap. {{U}} (45) {{

[填空题] American society is not nap friendly. In fact, says David Dinges, a sleep (36)________at the University of Pennsylvania School of Medicine. "There’’s even a (37)________against admitting we need sleep." Nobody wants to be caught napping or found (38)________at work. To quote a proverb: "Some sleep five hours, nature requires seven, laziness nine and (39)________eleven." The way not to fall asleep at work is to take naps when you need them. "We have to totally change our (40)________toward napping", says Dr. William Dement of Stanford University, the godfather of sleep research. Last year a national commission led by Dement (41)________an "American sleep debt" which one member said was as important as the national debt. The commission was (42)________about the dangers of sleepiness: people causing (43)________accidents or falling asleep while driving. This may be why we have a new sleep policy in the White House. According to recent reports, the President is trying to take