B.It's a good thing,but it really doesn't feel like it.C.Gravity helps out a lot more when you are upright.D.Most commonly,you wake up with worse symptoms.E.There are other reasons why you might feel worse at night.F.This is why sleep is so important after you've been to the gym.G.It also plays a critical role in controlling the heart and the immune system.【答案】16.D17.G18.F19.B20.E【解析】【导语】本文是一篇说明文。主要分析的是流感及类似感冒症状随着一天中的不同时间而好转或恶化的原因。【16题详解】根据空前的“You may have noticed,.however,that your cold seems to get better or worse depending on the time ofdy.(然而,你可能已经注意到,你的感冒似乎随着一天中的不同时间而好转或恶化。)”可知,感冒的症状在一天的不同时间而好转或恶化,结合空后的“Then,they partially clear up throughout the day,only to getworse once more as you get to bed..(然后,它们在一天中会部分消失,但在你上床睡觉时又会变得更糟。)”可知,此处讲述的是,在一天中症状部分消失,但到晚上情况又会变得更糟,由此可推断,此空处应描述的是感冒症状糟糕,D选项“Most commonly,.you wake up with worse symptoms.(最常见的是,你醒来时症状更严重。)”讲述的内容是对空前内容的进一步分析,刚醒来时,感冒症状糟糕,与空后的症状部分消失衔接,其中的hen为解题的关系信息。故选D项【17题详解】根据空前的“The circadian rhythm is very important for daily cellular processes and can be affected by the amountof sleep and light we get each day.(昼夜节律对日常细胞过程非常重要,并且会受到我们每天睡眠和光照的影响。)”可知,此处讲述的是昼夜节律的对日常细胞的影响以及昼夜节律受到睡眠和光照的影响,G选项“It also plays a critical role in controlling the heart and the immune system.(它在控制心脏和免疫系统方面也起着关键作用。)”讲述的是它对控制心脏和免疫系统方面也起着重要的作用,其中的t指代空前的Thecircadian rhythm,且空前的“very important'”与G选项中的“also plays a critical role in”相呼应。故选G项。【18题详解】根据本段的主题句“While resting,.the body uses the downtime to recover.(休息时,身体利用休息时间来恢复。)”可知,此处讲述的是休息对身体恢复的作用,结合空后的“This also applies when you are ill-一he bodyfloods the blood with white blood cells called leukocytes,resulting in and immune response against diseases and the第12页/共23页