{{B}}Taking a Nap During the
Day{{/B}} Medical experts say most Americans do not get enough
sleep. They say more Americans need to {{U}} (51) {{/U}}
for a short period in the middle of the day. They are advising people to sleep
lightly {{U}} (52) {{/U}}continuing with other
activities. One study earlier this year found that persons who
sleep for a few minutes during the day were less likely to die of {{U}}(53)
{{/U}} disease. The study followed more than 2,300 Greek adults
{{U}}(54) {{/U}} about six years. Adults who rested for half an hour at
least three times a week had a 37 percent lower {{U}} (55)
{{/U}}of dying from heart disease than those who did not nap.
Study organizers said the strongest {{U}}(56) {{/U}}was in working
men. They said naps might improve health by mitigating (减低) tension
{{U}}(57) {{/U}} by work. Some European and Latin
American businesses have Supported the idea of {{U}}(58) {{/U}}for many
gears. They urge(催促)people to {{U}}(59) {{/U}}work,go home and have a
nap before returning. In the United States, some companies let workers rest
briefly in their offices. They believe this reduces mistakes and accidents,and
also {{U}}(60) {{/U}}the amount of work a person can do.
Sleep experts say it is likely that people {{U}}(61) {{/U}}more
mistakes at work than at other times. They say people should not carry out
important duties {{U}}(62) {{/U}} they feel sleepy. And they say the
]rest thing to do is to take a nap. About twenty minutes of rest is all you
{{U}}(63) {{/U}}. Experts say this provides extra energy and can
increase your {{U}}(64) {{/U}} until the end of the day. But experts
{{U}} (65) {{/U}} that a nap should last no more than twenty to
thirty minutes. A longer nap will put the body into deep sleep and waking up
will be difficult.
【正确答案】
C
【答案解析】[解析] 本段第一句说“most Amerlcans donot get enoughsleep”(大多美国人睡眠不足)，因此中午才要休息一下。C选项rest(休息)符合上述理解，其它选项明显不合乎逻辑，故选C。
【答案解析】[解析] 本句的意思是，调查进行了六年。about six years之前要用表达一段时间的介词for。介词at和with明显与about six years不搭配，而选项in(about six years)表达的是未来的时间，如：He will come to Beijing in one day or two．(他一、两天之内会到北京。)因此也不符合本句意思，故选D。