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  3. While it’s easy enough to brush off a few sleepless nights with a pot of cof

While it’s easy enough to brush off a few sleepless nights with a pot of cof

游客2023-07-06  53
问题     While it’s easy enough to brush off a few sleepless nights with a pot of coffee and the occasional desk nap, you may be doing more harm than you realise. According to a new study from Surrey University, having less than six hours of sleep per night can actually shut down genes that play a key role in the body’s【C1】______of self-repair.
    We rely on our genes to constantly produce the proteins needed to【C2】______the wear on our bodies’ tissue that we suffer throughout the day. But when scientists divided 26 volunteers into two groups— one of which slept for less than 6 hours per night for an entire week and the other for 10 hours per night—some of the sleep-deprived group’s genes actually stopped working.
    The functions of 711 genes in total were altered in some way,【C3】______ones involved in metabolism(新陈代谢), inflammation(炎症), immunity and stress. There is some good news though; a week of normal sleep was enough to【C4】______the malfunctioning genes back to peak condition, but should the【C5】______sleep patterns continue, health problems that aren’t quite so easily reversible, like obesity(肥胖)and heart disease, have a【C6】______chance of cropping up. And this study only scratches the【C7】______according to Professor Colin Smith, one of the scientists【C8】______in the study: This is only a week of sleep【C9】______and it is only five and a half or six hours a night, Many people have that amount of sleep for weeks, months and maybe even years so we have no idea how much【C10】_______ it might be.
A)experiment I)slight
B)high J)specifically
C)involved K)substitute
D)namely L)surface
E)process M)unhealthy
F)restore N)unstable
G)restriction O)worse
H)reverse [br] 【C5】
选项
答案 M
解析 空格处修饰名词sleep patterns，故应填入形容词。根据上文的normal sleep和此处的but可知，空格所在句出现了转折，应该是不正常、不健康的睡眠模式，故应填入unhealthy，同时与下文的health problems对应，与文意相符。
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