英语任务型阅读及书面表达专练.docVIP

英语任务型阅读及书面表达专练 13 一． 任务型阅读 认真阅读下面短文，并根据所读内容在文章后表格中的空格里填入最恰当的单词。 Naturally regulate your sleep-wake cycle Melatonin（褪黑激素）is a naturally occurring hormone（激素）that helps regulate your sleep-wake cycle．Melatonin production is controlled by light exposure．Your brain should produce more in the evening, when its dark, to make you sleepy, and less during the day when its light and you want to stay awake．However, many aspects of modern life can disturb your bodys natural production of melatonin and your sleep-wake cycle． Spending long days in an office away from natural light, for example, can impact your daytime wakefulness and make your brain sleepy．Then bright lights at nightespecially from hours spent in front of the TV or computer screen—can hold back your bodys production of melatonin and make it harder to sleep, However, there are ways for you to naturally regulate your sleep-wake cycle, improve your bodys production of melatonin, and keep your brain on a healthy schedule． Increase light exposure during the day ☆Remove your sunglasses in the morning and let light onto your face． ☆Spend more time outside during daylight．Try to take your work breaks outside in sun light, exercise outside, or walk your dog during the day instead of at night． ☆Let as much light into your home/workspace as possible．Keep curtains and blinds open during the day, move your desk closer to the window． ☆If necessary, use a light treatment box．A light treatment box can create sunshine and can be especially useful during short winter days when theres limited daylight．Improve melatonin production at night ☆Turn off your television and computer．Many people use the television to fall asleep or relax at the end of the day．Not only does the light hold back melatonin production, but television can actually excite the mind, rather than relaxing it．Try listening to music or audio books, or practicing relaxation exercises．If your favorite TV show is on late at night, record it for