The first is regularity. Go to bed at the same time, wake up at the same time, no matter whether it’s the weekday or the weekend. Regularity is king, and it will anchor your sleep and improve the quantity and the quality of that sleep.

【2】 Your body needs to drop its core temperature by about two to three degrees Fahrenheit (华氏) to initiate sleep and then to stay asleep, and it’s the reason you will always find it easier to fall asleep in a room that’s too cold than too hot. So aim for a bedroom temperature of around 65 degrees, or about 18 degrees Celsius (摄氏度). 【3】

And then finally, in taking a step back, then, what is the mission-critical statement here? Well, I think it may be this: sleep, unfortunately, is not an optional lifestyle luxury. 【4】 It is your life-support system, and it is Mother Nature’s best effort yet at immortality (长生不老). And the decrease of sleep throughout industrialized nations is having a disastrous impact on our health, our wellness, even the safety and the education of our children. 【5】 And it’s fast becoming one of the greatest public health challenges that we face in the 21st century.

A.Is it a good idea to stay up?

B.The second is keep it cool.

C.It’s a silent sleep loss disease.

D.Sleep is a biological necessity.

E.What are your tips for good sleep?

F.That’s going to be the best option for the sleep of most people.

G.You can’t update your memory if you don’t have enough sleep.

【答案】

【1】E

【2】B

【3】F

【4】D

【5】C

【解析】

这是一篇说明文。21世纪威胁公众健康的最大挑战之一就是睡眠缺失症，那如何能睡个好觉，本文提出了两点建议，同时说明了睡眠对人的重要性。

【1】

根据上文Oh my goodness, how do I start to get better sleep?可知哦，我的天哪，我怎么才能睡得更好呢？以及空的后一句 if you're struggling with sleep at night, avoiding naps during the day, I have two pieces of advice for you.可知如果你晚上睡不好觉就要避免在白天睡觉，我有两条建议。由此可知，本句是在询问如何睡好觉。故E选项“你有什么好的睡眠秘诀吗？”符合上下文语境，故选E。

【2】

根据后文Your body needs to drop its core temperature by about two to three degrees Fahrenheit to initiate sleep and then to stay asleep, and it’s the reason you will always find it easier to fall asleep in a room that’s too cold than too hot.可知你的身体需要降低核心温度大约2到3华氏度来开始睡眠，然后保持睡眠状态，这就是为什么你会发现在一个冷的房间里比在一个热的房间里更容易入睡。由此可知，本句为第二条建议，是保持凉爽。故B选项“第二点是保持凉爽”符合上下文语境，故选B。

【3】

根据上文So aim for a bedroom temperature of around 65 degrees, or about 18 degrees Celsius.可知卧室的温度要控制在65华氏度左右，或者大约摄氏18度。由此可知，本句承接上文说为什么要这么设置温度——对于大多数人来说，这是最好的睡眠选择。故F选项“对于大多数人来说，这是最好的睡眠选择”符合上下文语境，故选F。

【4】

根据后文It is your life-support system, and it is Mother Nature’s best effort yet at immortality.可知它是你的生命维持系统，也是大自然母亲为永生所做的最大努力。由此可知，睡眠是一个不容置疑的生理需要。故D选项“睡眠是一种生理需要”符合上下文语境，故选D。

【5】

根据上文And the decrease of sleep throughout industrialized nations is having a disastrous impact on our health, our wellness, even the safety and the education of our children.可知整个工业化国家睡眠的减少对我们的健康，甚至我们的孩子的安全和教育造成了灾难性的影响。以及后文And it’s fast becoming one of the greatest public health challenges that we face in the 21st century.可知它正迅速成为我们在21世纪面临的最大的公共卫生挑战之一。由此可知，本句承接上文说明，睡眠的减少导致的是睡眠缺失症，且它正迅速成为我们在21世纪面临的最大的公共卫生挑战之一。故C选项“这是一种无声的睡眠缺失症”符合上下文语境，故选C。