2019届高三英语一轮复习 基础必备 Unit 4 Astronomy：the science of the stars课时作业 新人教版必修3

Unit 4 Astronomy the science of the stars李仕才一、阅读理解。

The Internet plays a big part in human life. We use it for work and entertainment. We can find new recipes on the Internet or advice on staying healthy. We can even use it to learn a new language. We use the Internet to connect with family and friends and stay in touch with issues we care about.The list goes on and on.As far as the Internet being a part of our lives—well, that train has left the station. That expression means there is no going back. If you prefer boating, you can say that ship has sailed.So, there may be no going back to an Internet-free life. But can using the Internet too much be bad for our health?It might be, say researchers.Study results show that teens who spend at least 14 hours a week online were more likely to have high blood pressure.High blood pressure makes your heart and blood vessels work too hard. Over time, this extra strain increases your risk of a heart attack or stroke.High blood pressure can also cause heart and kidney disease. It is also closely linked to some forms of dementia, a brain disease. Dementia is marked by memory disorders, personality changes, and a reduced ability to reason.Let’s introduce something about the study of it.The Henry Ford Hospital in Detroit, Michigan did the study. It involved 335 young people, from 14 to 17 years old. One hundred thirty-four of the teens were described as “heavy Internet users”. Researchers found that out of these 134 teens, 26 had high blood pressure.The researchers say the study is the first to connect heavy web use and high blood pressure. Other research has connected that heavy Internet use with health problems including anxiety, depression and obesity.The lead researcher of the study is Andrea Cassidy-Bushrow. In a statement she said, “Using the Internet is part of our daily life but it shouldn’t consume us. ”For the purpose of the study, she explains, teens considered heavy Internet users were online on “average 25 hours a week. ”Ms Cassidy-Bushrow adds that it is important for teens to take “regular breaks from their computers or smartphones” and to do some “kind of physical activity. ”She also suggests that parents limit their children’s use of the Internet to two hours a day, five days a week.【文章大意】互联网如此有用并且融入我们的生活, 但过度使用它, 会导致多种健康问题。

Unit 4李仕才[基础回顾]Ⅰ.单句语法填空1．Her puzzled (puzzle) look on her face suggested she didn't understand what I said.2．As is known to us，the Republic of China came into existence (exist) as an independent country in 1949.3．As we all know，a bad eating habit is harmful (harm) to one's health.4．Though injured seriously，he tried to cheer up，hoping to make his parents less worried.5．I can say that it is the most violent (violence) film that I have ever seen.6．My relationship with the actors is fundamental to my work as a director.7．As the old saying goes，it is easier to pull down than to build up.8．The old lady became seriously ill last week，and she has only existed on milk ever since.9．The new stadium being built for the next Asian Games will be three times bigger (big) than the present one.10．Sometimes he found it very hard to fall asleep at night，so he went to see the doctor.Ⅱ.单句改错(每句一错)1．She has got into the bad habit of reading in the bed，which is harmful for her eyes. for→to2．The twin brothers stood under the tree，puzzling and saying nothing. puzzling→puzzled3．Even though he is a little boy，strange ideas always exists in his mind. exists→exist4．You'll succeed on time because you are always working hard. on→in5．The sun heats the earth，which makes possible for plants to grow. makes 后加itⅢ.佳句写作1．据说这个发电厂(the power plant)是以前的5倍大。

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Unit 4 Astronomy：the science of the stars单元基础词汇语法回顾Ⅰ.单词拼写1．Their education ________ (体系） was perfect.2．I hope you will recover soon under this enjoyable ______（气候)．3．He felt ________(鼓励)by the progress he had made.4．The manager doesn't ________（允许)us to use the computer.5．The news that they were defeated ________(传遍）to the capital.6．Tornadoes are ________ （猛烈的)whirlwinds which vary in their width from a few yards to 1,300 feet.7．The small boat was ________(漂浮)on the surface of the water.8．A great ________（块)of rock had fallen from the cliff and now blocked the road。

【2019-2020】高三英语一轮复习基础必备Unit4Astronomy：thescienceofthestars课时作业新人教版必修3[基础回顾]Ⅰ.单句语法填空(导学号02516120)1．Her puzzled (puzzle) look on her face suggested she didn't understand what I said.2．As is known to us，the Republic of China came into existence (exist) as an independent country in 1949.3．As we all know，a bad eating habit is harmful (harm) to one's health.4．Though injured seriously，he tried to cheer up ，hoping to make his parents less worried.5．I can say that it is the most violent (violence) film that I have ever seen.6．My relationship with the actors is fundamental to my work as a director.7．As the old saying goes，it is easier to pull down than to build up.8．The old lady became seriously ill last week，and she has only existed on milk ever since.9．The new stadium being built for the next Asian Games will be three times bigger (big) than the present one.10．Sometimes he found it very hard to fall asleep at night，so he went to see the doctor.Ⅱ.单句改错(每句一错)(导学号02516121)1．She has got into the bad habit of reading in the bed，which is harmful for her eyes. for→to2．The twin brothers stood under the tree，puzzling and saying nothing. puzzling→puzzled3．Even though he is a little boy，strange ideas always exists in his mind. exists→exist4．You'll succeed on time because you are always working hard. on→in5．The sun heats the earth，which makes possible for plants to grow. makes 后加itⅢ.佳句写作(导学号02516122)1．据说这个发电厂(the power plant)是以前的5倍大。