2021高考英语二轮专题复习专题强化练二十一概要写作Ⅱ（原卷板+答案版）

专题强化练(二十一)　概要写作(Ⅱ) 阅读下面短文，根据其内容写一篇60词左右的内容概要。 A It is early in the morning and I've hardly caught any shut?eye. My breakfast of eggs，bread and strong coffee will keep me awake and alert before lunch.After lunch，I will face an afternoon of yawning in the office.Sometimes I feel uneasy about this situation but I am sure that I am not alone，for it is not too much to say that we all seem to be yawning more often.Are we turning into a generation of insomniacs (患失眠症的人)? How is modern life influencing our sleep patterns? We can start by blaming the light bulb and other forms of man?made light.Experts say that on average people go to bed and wake up two hours later than the previous generation.Then，there are the computers.Research led by Professor Charles Czeisler of Harvard Medical School has shown that people who read electronic books before going to bed take longer time to fall asleep.They have lower levels of melatonin，a chemical which controls our body clock.And they're less active in the morning.Professor Czeisler said，“In the past 50 years，there has been a decrease in average sleep length and quality.Since more people are choosing electronic devices for reading，communication and entertainment，especially teenagers who already experience serious sleep loss，research on the long?term influence of these devices on health and safety is urgently needed.” So the first thing to do if you want to have a restful night is leave computers out of the bedroom.The earlier you get your fingers off the keyboard，the sooner you tend to fall asleep.Avoid alcohol，as it might reduce our cycles of the “rapid eye movement” sleep，when our brains process the information we have received during the day.It prevents our brain activity going well.And do not eat nuts or cheese in the evening. After that，if you still cannot sleep，start counting sheep.Maybe that is the best way to avoid another afternoon of yawning in the office. _____ _____ _____ _____ _____ _____ _____ _____ B Do you ever wonder why the weather seems unpredictable these days? The unpredictability of the weather is caused by global warming，or climate change.Global warming is caused by the gradual increase in the earth's average temperature.Climate scientists agree on the primary cause of global warming.According to Karl，Melillo and Peterson，the atmosphere is trapping heat from the emission of certain gases，such as water vapor，methane，carbon dioxide，and nitrous oxide.This is mainly the fault of humans.We ought to be concerned about the potential danger of global warming.Not only will global warming cause many economic problems，but it will also destroy the land and even kill people. Many economic problems will be caused by global warming，especially if we wait to address the issue.The change in climate makes already drought areas grow drier with the heat.This affects agriculture in a negative way.If the ground is too dry，farmers will have a har ... ...