高考英语一轮复习 Unit 2 Cloning达标巩固练含解析新人教版选修8

1、cloning李仕才*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

2、 care about. the list goes on and on. as far as the internet being a part of our liveswell, 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 t

3、he 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

4、 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. lets introduce something about the

5、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 sa

6、y 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

7、part of our daily life but it shouldnt 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 d

8、o some “kind of physical activity. ”she also suggests that parents limit their childrens 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。1. the first two paragraphs mean that _. a. the list of the function of the internet is too long to be endlessb

9、. the internet has too many uses to countc. the number of the people in the world using the internet is too many to countd. the list of the uses of the internet is being lengthened day by day【解析】选b。细节理解题。由第一句“the internet plays a big part in human life. ”和第二段“the list goes on and on. ”可知, b项符合题意。2.

10、the reason of increasing peoples risk of a heart attack or stroke is that _. a. they use the internet too muchb. they pay little attention to their healthc. high blood pressure makes their heart and blood vessels work too hardd. using the internet too much makes their heart and blood vessels work to

11、o hard【解析】选c。细节理解题。由第七段“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. ”高血压使得人们的心脏和血管超负荷运行。长此以往, 这种超负荷运行会增加心脏病和中风发生的风险。” 可知c项正确。 3. which of the following may using the internet too much contribute t

12、o besides teenagers high blood pressure? a. anxiety, depression and obesity. b. memory disorders, and personality changes. c. dementia, a brain disease. d. a heart attack or stroke. 【解析】选a。细节理解题。根据第十一段内容可知: 科研人员说研究结果表明过度使用互联网首先导致高血压。其他研究结果表明还可导致其他健康问题, 如: 忧虑、情绪低落和肥胖。故a项正确。4. ms cassidy-bushrow sugge

13、sts that the proper time children spend using the internet should be _. a. 25 hours a weekb. 10 hours a weekc. 5 hours a day d. 14 hours a week【解析】选b。细节理解题。根据最后一段: “她还建议家长应该把孩子使用互联网的时间限制在每天两小时, 每周五天。” 故b项正确。*语法填空。the truth_1_trees are vital to our life is not a secret. they provide us with food, woo

14、d and most _2_(important), oxygen. now there is one more thing we can add to this listblocking out harmful bacteria from water.the discovery _3_(make) by a team consisting of scientists from the massachusetts institute of technology (mit) and high school students_4_were seeking a natural water filte

15、rone that would help communities in developing countries that do not have _5_(accessible) to modern water filter systems.the _6_(research), led by professor rohit karnik, decided to turn to trees for help because they could allow liquid to flow through, while blocking out air bubbles.they began by c

16、utting 1.5inchwide sections of tree bark from the branches of a white pine tree. the people related then tested the wood's filtering ability by _7_(pour) water containing red dye particles of different sizes through. to their _8_(amaze), they found that it was effective in trapping all the artic

17、les. _9_(encourage), the team conducted _10_experiment, this time with water that contained bacteria. sure enough, the sapwood held back 99% of the bacteria, allowing only 1% to flow through.1_2._3._4._5._ 6._7._ 8._ 9._10._ 篇章导读：本文是一篇说明文。树木对人类至关重要，本文通过两个实验证明了树木除了能够提供食物、木材、氧气等作用外，还能够隔离细菌。1that 考查同位语

18、从句的连接词。第1空后的内容解释说明名词truth的内容，因此设空处引导同位语从句，只起连接作用，不作成分。故填that。2importantly 考查词性转换。此处表示“最重要的是”，应用副词形式，构成固定短语most importantly，故填importantly。3was made 考查动词的时态和语态。分析句子结构可知，此处动词在句中作谓语。根据全文主体时态为一般过去时可知，该句也应用一般过去时；make与discovery之间为动宾关系，故应用被动语态。4who/that 考查定语从句的引导词。设空处引导定语从句，在从句中作主语，先行词是scientists and high s

19、chool students，指人，故用who或that引导。5access 考查词性转换。have access to为固定短语，意为“有使用的机会”。6researchers 考查词性转换及名词的数。根据本句中的decided to可知，设空处应填名词作句子主语，指“研究人员”，且由从句中的they可知，故应用复数形式researchers。7pouring 考查非谓语动词。提示词为动词pour，空前为介词by，其后应用动名词。故填pouring。8amazement 考查固定用法。“to one's名词”为固定用法，意为“令某人的是”，故填amazement。9encourage

20、d 考查非谓语动词。encourage与主语the team之间为逻辑上的动宾关系，故应用过去分词形式，在句中作原因状语。10another 考查限定词。根据第10空后的内容可知，这个小组又做了另外一个实验，故填another，意为“另一个”。*完形填空。falling off a boxcar and landing on my head，i lost my sight when i was four years old.now i am thirty­two.i can _1_ remember the brightness of sunshine.it would be won

21、derful to see again，_2_ a tragedy can do strange things to people.it _3_ to me that i might not have come to love life as i do now if i hadn't been blind.my parents and my teacher saw something _4_ me，and they made me want to _5_ against blindness.the hardest _6_ i had to learn was to believe in

22、 myself.if i hadn't been able to do that，i would have _7_ down for the rest of my life.when i say _8_ in myself i am not talking about _9_ the kind of self­confidence that _10_ me down an unfamiliar staircase(楼梯)alone.but i mean something bigger than that：the assurance that i am a real posi

23、tive person _11_ imperfections.it took me years to obtain this _12_.it had to start with the _13_.once a man gave me an indoor _14_.“i can't use this，”i said.“take it with you，” he _15_ me，“and roll it around.”the _16_ stuck in my head.“roll it around！” by rolling the ball i could hear where it

24、went.this gave me an idea how to achieve a goal i had thought _17_. at the school for the blind i _18_ a new kind of baseball called the “ground ball”all my life i have set a series of goals and then tried to reach them，one at a time.i had to learn my _19_.i would fail sometimes anyway but on the av

25、erage i made _20_.1a.randomly babruptlycroughly dcompletely2a.so bbutcthus dand3a.occurred breferredcbrought dturned4a.of bforcto din5a.get bfightcfind ddrop6a.method bexperienceclesson dmanner7a.broken bputcsettled dlay8a.courage bambitioncbelief dpower9a.firmly bsimplycfairly dslightly10a.stops bh

26、elpscfinds dgives11a.despite bbesidescwithout dunlike12a.description bexistencecaccusation drecognition13a.intelligence bincidentctrouble ddetermination14a.chair bbaseballcgame ddesign15a.urged bblamedcgreeted dteased16a.goals bwordscimages dideas17a.valuable breasonablecimpossible dunbearable18a.di

27、scovered bequippedcformed dinvented19a.limitations badvantagescpuzzles dpersonalities20a.sense bprogresscmistakes ddecisions【解题导语】本文是一篇夹叙夹议文。文章主要讲述了“我”在四岁的时候失去了视力，但通过一件小事，“我”学会了自信，并逐渐取得进步的过程。【核心词汇】tragedy悲剧imperfection缺点on the average一般来说roughly粗略地1c考查副词。“我”四岁时失去视力，现在已经三十二岁了。由此可推知，此处表示“我”粗略地记得，故选c。r

28、oughly“粗略地，大致上”。2b考查连词。根据语境可知，上下文之间是转折关系，故选b。3a考查动词。“我”想到如果“我”没有失明“我”可能不会像现在这样热爱生活。it occurs to sb.that.为固定句型，意为“某人想到”。4d考查介词。“我”父母以及老师看到了“我”内在的一些东西，他们让“我”想要与失明作斗争。根据语境可知，此处应选d。5b考查动词。参见上题解析。fight against.“与作斗争”。6c考查名词。“我”学到的最困难的一课(lesson)就是要相信“我”自己。7a考查动词。如果“我”做不到那样的话，“我”可能已经精神崩溃了。break down“(在健康或精

29、神等方面)垮掉”。8c考查名词。根据上文中的“to believe in myself”可知，此处应选c项与上文相照应。9b考查副词。“我”说的信心并不仅仅(simply)指帮助(helps)“我”走下陌生楼梯的自信。10b考查动词。参见上题解析。11a考查介词。尽管“我”是一个不完美的人，但是“我”是一个积极的人。despite“尽管”，符合语境。12d考查名词。“我”花了很多年才认识到这一点。a项意为“描述”；b项意为“存在”；c项意为“控告”；d项意为“认识”。13b考查名词。这从一件小事开始。a项意为“智慧”；b项意为“小事”；c项意为“麻烦”；d项意为“决心”。14b考查名词。根据下

30、文中的“a new kind of baseball”可知，此处指棒球。15a考查动词。根据语境可知，此处指他一直在敦促“我”。urge“强烈要求，敦促”。16b考查名词。他所说的话(words)印在“我”的脑海中，故选b。17c考查形容词。这给了“我”一个如何实现”我”认为不可能(impossible)的目标的想法。a项意为“有价值的”；b项意为“合情理的”；c项意为“不可能的”；d项意为“无法容忍的”。18d考查动词。在盲人学校“我”发明(invented)了一种新的被称之为“地滚球”的棒球。a项意为“发现”；b项意为“配备”；c项意为“形成”；d项意为“发明”。19a考查名词。“我”不得

31、不了解自己的不足之处。limitation“(某人或某物的) 局限性，不足之处”。20b考查名词。“我”有时会失败，但一般说来“我”取得了进步。make progress“取得进展”。*短文改错。this is my fifth day at the summer camp. life isn't exact what i expected. we have to get up early to make our beds before our teacher miss li come to inspect. after breakfast, we have some of free

32、time. yesterday morning i went fishing, but the only thing i catch was a tree branch. in the afternoon, there are different activity like horseback riding and hiking. they're fun, so nothing new for me. in the evening, everyone is assigned a different task to get dinner ready. yesterday, i was in charge of prepare the hot dogs, but i