1、课时作业7Unit 3Section Reading and Thinking.单句语法填空1In my view, high school students should have a balanced diet and eat more fruit and vegetables instead of junk food, which can be _ (benefit) to their health.2She found herself stuck at home with only her computer _ (keep) her company.3In my opinion, it
2、 is very important _ (bridge) the digital divide and make sure everyone has access to the Internet.4Some young people spend their free time using smartphones for _ (chat)5Only in this way can we enjoy the pleasure and _ (convenient) of the shared bikes.6It is _ an interesting book as I read it again
3、 and again.7Now that you are interested in Chinese culture, I suggest you apply for Peking University, where you can have access _ the best Chinese culture.8There are many students _ (stand) in a line to welcome the old soldier.9An Englishspeaking contest can improve the students ability _ (speak) E
4、nglish.10We often walk to the beach, which is within walking _ (distant) of my house.阅读理解AThe Internet plays a big part in human life. We use it for work and pleasure. We use it to learn a new language. We find advice on it. We use it to connect with our family and friends. We use it to stay in touc
5、h with events 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. There is no possibility of going back to an Internetfree life. But can using the Internet too much be bad for our health? It might be, say researchers. A new s
6、tudy finds that heavy Internet use may be connected with high blood pressure (血压) in a young group: teenagers. The study results show that teens who spend at least 14 hours a week only online may cause high blood pressure, which makes your heart and blood vessels (血管) work too hard. Over time, this
7、extra pressure increases your risk of a heart attack. High blood pressure can also cause other diseases. The Henry Ford Hospital in Detroit, Michigan did the study. 335 young people, from 14 to 17 years old, took part in it. 134 of the teens are described as “heavy Internet users”. And researchers f
8、ind that out of these 134 teens, 26 have high blood pressure. The researchers say the study is the first to connect heavy web use with high blood pressure. The lead researcher is Andrea CassidyBushrow. She says, “Using the Internet is part of our daily life, but it shouldt ruin us.” Ms. CassidyBushr
9、ow adds that it is important for teens to stop to have a rest regularly from their computers or smartphones and do some kind of physical activities. She also suggests that parents shouldnt let their children use the Internet for more than two hours a day, five days a week.1What does the underlined p
10、art “that train has left the station” mean in Paragraph 2? AThe train has stopped at the wrong station. BLife without the Internet is nowhere to be found. CThe train has changed its course. DThere is something wrong with the station.2What is Paragraph 3 mainly about? AThe advantages of Internet use.
11、 BThe harm of high blood pressure. CThe harm of Internet overuse to teens. D. Ways to prevent high blood pressure.3What would Andrea CassidyBushrow agree? ATeenagers shouldnt use the Internet. BThe Internet will ruin human life in the future. CRegular breaks are necessary when using the Internet. DS
12、martphones are more harmful than computers.4What can be used as the best title of the passage? AHeavy Internet users are mostly teenagers BHow to prevent teenagers from the Internet CEvery coin has two sides so does the Internet DToo much Internet use may be bad for teenagersBAlexa is a form of arti
13、ficial intelligence, or AI for short. Many people start their mornings by asking Alexa for the weather forecast or the latest news. A device (设备) that houses Alexa can also play music from your favourite playlists, keep a shopping list, order takeout food, answer questions, send messages and even ru
14、n “smart” home controls. Training AI systems to respond to problems with humanlike intelligence and learn from their mistakes can take months, or even years. Consider Alexa and similar software, such as Apples Siri. To do the tasks its human owners ask, these systems must make sense of and then resp
15、ond to sentences such as, “Alexa, play my Ed Sheeran playlist” or “Siri, what is the capital of India？” Computers cant understand language as it is spoken by people. So AI researchers must find a way to help humans communicate with computers. The technology used to get computers to “understand” huma
16、n speech or text is known as natural language processing. By natural language, computer scientists refer to the way people naturally talk or write. To teach an AI system a task like comprehending (理解) a sentence or responding to a persons last move in a board game, scientists need to feed it lots of
17、 examples. AlphaGo is an AI system designed by Google that has beaten a human champion, Lee Sedol, at the strategy (策略) board game Go. To train AlphaGo, Google had to show it 30 million Go moves that people had made while playing the game. Then AlphaGo used what it learnt to analyse those plays as i
18、t played against different versions (版本) of itself. During this practice, the program came up with new moves ones never seen in games between people.5What does the example of Alexa show?AAI may replace humans one day.BAI is playing a role in our modern life.CAI has been widely used around the world.
19、DAI has totally changed peoples bad habits.6How do scientists train AI systems? ABy testing them thousands of times. BBy teaching them almost everything. CBy giving them quite a lot of tasks to do. DBy providing them with large amounts of data.7What can we learn about AlphaGo? AIt has become very sk
20、illful and intelligent. BIt is the most convenient AI system. CIt avoids making any mistake. DIt just follows human orders.阅读七选五 Many kids and teenagers have cellphones in their hands. However, is it really necessary for them to have phones at school? Here are the pros and cons.Pros They can get in
21、touch when necessary. The main benefit of having a phone is that your children can get in touch with you whenever they need to. _1_ They can call the emergency services if necessary. If your children are in immediate danger, they can use their phones to call not only you but the emergency services.
22、This is of great benefit and could potentially save your childrens lives._2_ As long as your children remember to do this, their phones wont cause distraction (分心) in class. Giving them a standard instead of a smartphone will also reduce the risk of distraction.Cons The latest smartphones can almost
23、 double as a computer. It means they offer far more of a distraction to kids than they used to. _3_ All these characteristics could disturb your childrens concentration (注意力) if they play with them in class. Cellphones could interrupt lessons. Many children, even though they are asked to do so, forg
24、et to turn off their phones during lessons and their phones may make sounds. _4_ Besides the distraction problem, cellphones can also be used to look up answers on the Internet. _5_ The possibility of children having access to these during exams could be too attractive for them not to take advantage
25、 of.ACellphones can be turned off or put on mute.BChildren use ordinary phones instead of smartphones.CThis allows you to feel they are safe and easy to reach.DWithout cellphones, campus life would be less colourful.EThey have some other functions a calculator and the ability to save notes.FThis not
26、 only annoys other pupils, but also prevents them from learning well.GNowadays, children can not only text and make calls with their phones, but also play games, surf the Internet and listen to music.课时作业7.单句语法填空1beneficial2.to keep3.to bridge4.chatting5.convenience6.such7.to8.standing9.to speak10.d
27、istance.阅读理解A【语篇解读】研究证明，过度使用互联网会对青少年的健康造成损害。1答案与解析：B句义猜测题。由第二段中的“There is no possibility of going back to an Internetfree life”可知，再也不能回到没有互联网的生活了。所以判断出第二段画线部分的意思是再也不能回到没有互联网的生活了。故选B。2答案与解析：C段落大意题。由第三段内容可知，研究结果表明，一周至少上网14小时的青少年可能会患上高血压，这会使你的心脏和血管超负荷工作。随着时间的推移，这种额外的压力会增加心脏病发作的风险。高血压也会引起其他疾病。所以第三段主要在谈论
28、过度使用互联网对青少年血压的危害。故选C。3答案与解析：C细节理解题。由最后一段中的“Ms. CassidyBushrow adds that. do some kind of physical activities”可知，Andrea CassidyBushrow认为在使用互联网时，定期休息是有必要的。故选C。4答案与解析：D标题归纳题。由第二段中提出的疑问“But can using the Internet too much be bad for our health”及下文的研究结果可知，本文围绕着“过度使用互联网会对青少年的健康造成损害”这一话题展开并进行论证。所以短文的最佳标题为“
29、过度使用互联网会对青少年的健康造成损害”。故选D。B【语篇解读】本文是一篇说明文，介绍了人工智能在我们的现代生活中发挥的重要作用，同时还介绍了科学家对AI技术的研究和探索。5答案与解析：B细节理解题。根据第一段最后一句A device that houses Alexa can also play music from your favourite playlists, keep a shopping list, order takeout food, answer questions, send messages and even run “smart” home controls.可知，A
30、lexa的例子表明，人工智能在人们的现代生活中发挥重要的作用。故选B项。6答案与解析：D细节理解题。根据第三段最后一句To teach an AI system a task like comprehending a sentence or responding to a persons last move in a board game, scientists need to feed it lots of examples.可知，研究人员为了让AI学习任务，需要给它输入很多例子，让它理解相关的含义。也就是说科学家给AI提供了很多数据来训练它，故选D项。7答案与解析：A细节理解题。根据最后一
31、段第一句AlphaGo is an AI system designed by Google that has beaten a human champion, Lee Sedol, at the strategy board game Go.和最后一句可知，AlphaGo在围棋棋艺上很出色，甚至击败了世界冠军李世石，还有了自己的下法。这说明它棋艺纯熟、特别聪明。故选A项。.阅读七选五【语篇解读】本文主要讨论了孩子带手机的优缺点。1答案与解析：C空前讲孩子带手机可随时联系家人，空后讲带手机在有困难时可急救，C项承上启下，故选C项。2答案与解析：A该段讲的是避免上课分心的办法，设空处应是关上手机
32、或调到静音，故选A项。3答案与解析：G根据设空后的All these characteristics could disturb your childrens concentration.可知设空处应是手机的特点，正是这些特点让孩子分心，故选G项。4答案与解析：F根据前一句中的forget to turn off their phones during lessons and their phones may make sounds以及后一句中的the distraction problem可知，设空处与distraction有关。F项(这不仅打扰别人还妨碍其他人好好学习)符合语境。故选F项。5答案与解析：E根据下一句The possibility of children having access to these during exams could be too attractive for them not to take advantage of.(孩子们在考试中能使用这些功能的可能性对他们来讲很有吸引力，想不利用都难。)中的these的含义，可推知选E项。
