2019-2020学年高中英语 Unit 20 New Frontiers Lesson 3练习 北师大版选修7.docx

1、Lesson3ScientificBreakthroughs课时过关即时巩固一、单词拼写1.He was faced with the d of whether or not to return to his country.答案:dilemma2.The children were s into four groups.答案:split3.The (总理) deals with important affairs of the state.答案:premier4.The policeman had to w with the case in order to catch the crimin

2、al.答案:wrestle5.Its too early to know the (结果) of her illness.答案:outcome二、完成句子1.这些学生的年龄在19岁到22岁之间。These students ages 19 22 years old.答案:range from;to2.他们拥有两套房子,另外还有一条船。They own two houses,a boat.答案:not to mention3.他现在仍在同他的前任女友通信。He is still his former girlfriend.答案:corresponding with4.我正要锁门,这时天开始下雨了

3、。I lock the door it began to rain.答案:was about to;when 5.她下决心要让儿子改掉坏习惯。She decided to her son his bad habit.答案:cure;of三、阅读理解AAirtight plastic bags can help farmers protect their harvests without the use of harmful chemicals.These bags are designed to keep air out of crops in storage.Using them is a

4、simple way to fight insects and keep crops fresh.Ten countries in West and Central Africa are involved in a project to improve the storage of cowpeas,also known as black-eyed peas.Farmers can lose much of the harvest to insects called bruchids(豆象),which grow from eggs to adults in a few weeks and th

5、en lay forty to sixty eggs.They can destroy the whole harvest within months.Farmers can sell their crops immediately.But selling crops at harvest time means more competition and lower prices.Or they can use pesticides(杀虫剂) to kill the bugs.But a crop scientist Dieudonne Baributsa says,“They end up m

6、isusing or overusing the pesticide.In Nigeria,a lot of cases of death have been reported.They usually call cowpeas killer beans in Nigeria.”Mr Baributsa is a researcher at Purdue University in Indiana,America.The project is called PICSPurdue Improved Cowpea Storage.He says the storage bags are thick

7、 enough so that any insects already in the cowpeas will die from a lack of oxygen.The lack of air will also help prevent the growth of bacteria that can ruin the harvest.The bags cost about two dollars each.Mr Baributsa says that is not much,especially if it means farmers can wait long enough to get

8、 a better price for their crops.The bags are produced locally.Donors currently support the project,but the groups involved are working to build a lasting market for the bags because donation for the project will not last forever.A company based in the United States called GrainPro makes another kind

9、 of airtight bags.These are called Super Grainbags.Phil Villers,the companys president,says storing a harvest safely not only helps farmers earn more money,but also reduces the amount of the harvest loss to insects,spoilage and mishandling.“What does not get wasted means it is possible to feed a hun

10、gry world,” said Phil Villers.1.What is the best title for this passage?A.Simple Bags Save the HarvestB.Plastic Bags Kill the InsectsC.Bruchids Do Harm to the HarvestD.Pesticides Threaten Food Safety解析:本文属新闻报道类文章,开头即点明了本文的中心,故选A项。答案:A2.It can be inferred that bruchids .A.steal the stored crops for t

11、heir futureB.survive in airtight plastic bagsC.grow slowlyD.breed fast解析:从第二段的“whichgrowfromeggstoadultsinafewweeksandthenlayfortytosixtyeggs.Theycandestroythewholeharvestwithinmonths.”可知选D项。答案:D3.How does the name of “killer beans” come out?A.The beans are poisonous by nature.B.People eat beans tha

12、t are infected by bugs.C.Farmers use chemicals to kill bugs improperly.D.Bugs ruin beans within a short time.解析:从第三段的“Theyendupmisusingoroverusingthepesticide.InNigeria,alotofcasesofdeathhavebeenreported.TheyusuallycallcowpeaskillerbeansinNigeria.”可知选C项。答案:C4.Which of the following statements is NOT

13、 true?A.Any insects in the bags will soon use up the air and then die.B.The airtight plastic bags currently sold on the market do not last long.C.The project provides the farmers with the bags for free at present.D.What farmers can earn from the use of the bags is more than they have to pay.解析:从第四段的

14、“Hesaysthestoragebagsarethickenoughsothatanyinsectsalreadyinthecowpeaswilldiefromalackofoxygen.”可知A项正确;从第四段的“Donorscurrentlysupporttheproject”可知现在为农民提供免费的塑料袋,故C项正确;从第四段的“getabetterpricefortheircrops”可知D项正确;文章提到免费为农民提供塑料袋持续的时间不会长,而不是市场上卖的塑料袋用的时间不够长,可知应选B项。答案:BBSince his students began using Quizlet,E

15、nglish teacher Tristan Thorne has noticed an improvement in their ability to learn and use new words.Quizlet is a learning App,a computer program you use on your mobile phone.It can help users build and test their knowledge of English words.Quizlet has word sets for millions of subjects.And,it is qu

16、ickly becoming a useful mobile tool for language learners.Thorne teaches at Columbia University in New York City.Thanks to learning Apps,Jeff Strack,another English teacher,has also noticed improvement in his students ability to remember information.He teaches at Hostos Community College,also in New

17、 York.He and Thorne are part of a growing number of language educators adding mobile Apps to their classes.Strack and Thorne seem to agree that the days when teachers would not permit the use of mobile phones are gone.When they use Apps,language learners communicate more differently than in a tradit

18、ional classroom.Users act on or respond to something,instead of just listening to new information.Thorne believes that Apps can help learners become more active in learning.For example,each week,his students are required to add vocabulary words into Quizlet for others to use.He says some Apps also m

19、ake it easy for students to know their language strengths and weaknesses.The biggest improvement Strack has seen in his students is that they are much more active in whole-class or small-group discussions.“Apps let all students take part in the activity,whether its a game,quiz or practice activity.”

20、 he says.Many existing learning Apps are designed for students of all ages and levels.Some are designed for group activities.Some support independent learning.Still some are good for homework.Thorne says he especially likes Quizlet and three other Apps: QR Codes,Socrative and Evernote.5.What do Stra

21、ck and Thorne do to improve their teaching?A.They design learning Apps for their students.B.They dont allow their students to use Apps after class.C.They allow their students to use mobile Apps to study.D.They order their students not to use mobile phones in class.解析:根据第一段中的“Sincehisstudentsbeganusi

22、ngQuizlet,EnglishteacherTristanThornehasnoticedanimprovementintheirabilitytolearnandusenewwords.”和第二段中的“HeandThornearepartofagrowingnumberoflanguageeducatorsaddingmobileAppstotheirclasses.”可知Strack和Thorne为了提高教学,都允许学生们在课堂上使用mobileApps。故选C项。答案:C6.According to the text,Apps can help language learners .

23、A.take an active part in learningB.save much time and moneyC.remember their weaknessesD.improve personal designing skills解析:根据第三段中的“WhentheyuseApps,languagelearnerscommunicatemoredifferentlythaninatraditionalclassroom.Usersactonorrespondtosomething,insteadofjustlisteningtonewinformation.”第四段中的“Thorn

24、ebelievesthatAppscanhelplearnersbecomemoreactiveinlearning.”和第五段中的“ThebiggestimprovementStrackhasseeninhisstudentsisthattheyaremuchmoreactiveinwhole-classorsmall-groupdiscussions.”可知使用mobileApps后,学生们上课表现更积极活跃,故选A项。答案:A7.What can we learn about the existing learning Apps?A.They have three types in to

25、tal.B.They are too few to choose from.C.They are only designed for homework.D.They are designed for different uses.解析:根据最后一段中的“ManyexistinglearningAppsaredesignedforstudentsofallagesandlevels.Somearedesignedforgroupactivities.Somesupportindependentlearning.Stillsomearegoodforhomework.”可知现存的学习软件分别被设计

26、有各自的用途,故选D项。答案:D8.What can be the best title for the text?A.Great changes in science and technology.B.The use of mobile phones will be gone.C.Ways to choose from different mobile Apps.D.Better language learning with mobile Apps.解析:文章介绍了一种在手机上使用的应用程序Quizlet,它能帮助用户构建和测试他们的英语词汇知识,是语言学习者的一个有用的移动工具。在运用中学

27、生们积极学习,效果很好。D项,用手机软件更好地学语言,概括全文适合作为标题。故选D项。答案:D四、七选五阅读理解根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Today it is common to see people who walk about with coloured wires hanging from their ears wherever they go.They move about in their personal bubbles,sometimes unaware of whats going on around them.1. O

28、utside life is shut out.So are you one of them?For me,walking around in my own personal bubble is perfect.2.Whats even better,wearing earphones seems to give people a signal which says,“Im not available for chatting at the moment!”Suppose that youre at work and about to make an incredible breakthrou

29、gh,but a colleague suddenly turns up.At this precise moment,the slightest disturbance would break your concentration.3.Once again,those wires hanging from your ears would be sure to give that “Go away!”signal.4. Its probably part of the growing up stage when they just want to ignore their whole fami

30、ly.While their mothers give them lectures about why they should do their“Yes,mom”,the earphones solve the problem.Pretty soon,not only will we have pretty coloured wires hanging from our ears,but also our brains will be directly plugged into some new high-tech instruments.Well be in a virtual(虚拟的) w

31、orld,communicating with everyone else or choosing not to,as we like.In this world,we will all be permanently plugged in.5.And they are changing our social habits along the way.In the end,there is a thin line between using technology as a tool for making life better and being a slave to it!Its so str

32、ange that suddenly,I dont feel like wearing my earphones anymore.A.Our instruments are changing quickly.B.I also have wires hanging from my ears.C.In the home situation,teenagers love these wires.D.I dont have to deal with the noise from the environment.E.After all,I am listening to my favourite music and would rather not be disturbed.F.Listening to music through earphones is the perfect way to ignore such interruptions.G.They walk around in their own spaces,with their personal“digital noise reduction systems”.答案:15 GDFCA