Unit-2-单元话题完形填空专项练习.docx

Unit 2单元话题完形填空专项练习
(名校最新真题)
（2022·重庆八中高二月考）Trackers on Ice
Just because a scientist puts a GPS tracking collar on a wild polar bear does not mean the animal will willingly keep it on.   ___1___, these huge collars are purposefully loose so that if one becomes annoying, a bear can ___2___it. But scientists have now found a way to use signals from the discarded(丢弃的)devices.
“These dropped collars___3___would have been considered garbage data,” says Natasha Klappstein, a polar bear researcher at the University of Alberta. She and her colleagues instead used___4___from such collars, left on sea ice in Canada's Hudson Bay, to track the ice itself. For their study, published in June in The Cryosphere, the researchers ___5___twenty collars that sent movement data consistent(与······一致的)with ice drift rather than polar bear ___6___between 2005 and 2015. The resulting records of how melting ice typically drifts in Hudson Bay are unique; there are no easily ___7___on-the-ground sensors, and satellite observations often cannot ___8___capture the motion of small ice sheets.
The team compared the discarded collars' movements with widely used ice-drift modeling data from the U.S. National Snow and Ice Data Center (NSIDC). Collar data indicated that the NSIDC model underestimates the speed at which ice moves around in Hudson Bay--as well as the overall ___9___of drift. Over the course of several months the model could drift away from an ice sheet's location by a few hundred kilometers, the researchers say.
This means the bears may be working harder, when moving against the direction of the ice, than scientists had   ____10____ .“Since we're underestimating the speed of drift, we're likely underestimating the energetic effort of polar bears," says Natasha Klappstein. The research reveals____11____insight (洞悉) into how highly mobile ice moves. As melting increases in coming years, such ice will likely become more ____12____farther north, in the central Arctic. Scientists had known NSIDC data could underestimate drift speeds, but “any time we can find a data ____13____,it is a good thing.”
Plus,such data could improve predictions about how oil spills or other pollutants may spread in seas ____14____ with drifting ice, says Walt Meier, a senior NSIDC research scientist,who was not involved in the study. The findings may even ____15____future NSIDC models. “It's a really nice data set,” Meier says."And certainly one we’ll take consideration.
1．A．In fact B．In a way C．In addition D．In the end
2．A．destroy B．remove C．resist D．reject
3．A．particularly B．relevantly C．intentionally D．potentially
4．A．estimates B．subjects C．measurements D．patents
5．A．displayed B．identified C．justified D．preserved
6．A．behavior B．habitat C．manner D．motion
7．A．flexible B．favorable C．accessible D．changeable
8．A．internally B．accurately C．securely D．independently
9．A．extent B．damage C．trend D．limit
10．A．agreed B．promised C．proved D．assumed
11．A．immediate B．superior C．entire D．timely
12．A．evident B．unique C．common D．realistic
13．A．gap B．scan C．boom D．fit
14．A．replaced B．littered C．packed D．matched
15．A．reverse B．resemble C．influence D．motivate

（2021·上海·格致中学高二期末）Do you remember how you felt the first time you rode bike? What about your first heartbreak? ____16____ moments and the emotions they arouse can resonate in our minds for decades, powerfully shaping who we are as individuals. But for those who experience severe trauma(创伤), such painful memories can leave people with life-changing mental conditions. So, what if traumatic memories did not have to cause so much ___17___ ? For now, the work is happening in mice.
Neuroscientists usually define a singular memory as an engram---a physical change in brain tissue ____18____ a particular recollection. While at MIT in 2013, Steve Ramirez of Boston University and his research partner Xu Liu had a breakthrough: They were able to target the cells that ___19___ one engram in a mouse's brain and then implant a false memory. In their work, mice __20__ in fear to a particular stimulus even when they had not been conditioned in advance.
In their current work, Ramirez and his colleagues are investigating whether ___21___ memories can be “overwritten” by positive ones. In their experiments, positive memories are created by putting male mice in cages with female ones for an hour, and negative memories are created by putting the mice in cages that deliver brief foot shocks. After a surgical operation on the mice, the researchers find that ___22___ positive memories while mouse is in a cage makes it less fearful. They think that this memory “retraining"may be helping to ___23___ some of the mouse's trauma. ___24___ , it is unclear whether those original fear memories are completely lost or just suppressed(抑制).
__25__ Ramirez’s team stresses that their work in mice is preliminary(初步的), they see treatment potential for humans down the road. Those suffering from PTSD or depression could have their memories ___26___ , for instance, so that they don't have a strong ___27___ response to painful recollections.
If it’s one day possible to alter human memory, who should be allowed to receive that treatment? And would the ___28___ system be at a disadvantage if key witnesses and victims cannot remember a crime? These are questions New York University bioethicist Arthur Caplan says are worth thinking about before the technology is ready for human clinical settings.
As neuroscientists progress with their research, they say these ___29___ issues are being taken into account. Ramirez sees the idea of   ___30___ memories as neither good nor bad. Like water, it just depends on how you use it.
16．A．Forgettable B．Memorable C．Sustainable D．Believable
17．A．fruit B．difference C．pain D．movement
18．A．associated with B．exchanged for C．sentenced to D．deprived of
19．A．put off B．pick up C．turn on D．make up
20．A．reacted B．hurried C．stunned D．resolved
21．A．short-term B．negative C．enjoyable D．reliable
22．A．deleting B．decreasing C．activating D．pausing
23．A．recreate B．eliminate C．liberate D．memorize
24．A．Therefore B．Besides C．Indeed D．However
25．A．Since B．Unless C．Until D．While
26．A．removed B．strengthened C．altered D．stimulated
27．A．emotional B．physical C．controversial D．mechanical
28．A．immune B．justice C．medical D．commerce
29．A．mental B．ethical C．criminal D．equality
30．A．killing B．multiplying C．controlling D．justifying

（2022·全国·高二单元测试）Recently we carried out a survey of 1,000 people from different countries to find out what they think ___31___will be like in the future. The results clearly show both our ___32___and fears.
The survey suggests that___33___ — one of the most important human relationships — will change greatly. People will make friends through the Internet. Computers will become really___34___by 2050. Even now, some people describe them as their best friends! Others, ___35___, say that we will become much more isolated (孤立的) from each other ___36___we will have little real human communication.
Education will ___37___ a lot too. As more and more children will be using computers in schools, certain ___38___, such as mental arithmetic (心算), won’t be necessary. Even writing by hand will have become a thing of the___39___.
According to the survey, home life will be____40____. Most people believe that by 2050 robots will be doing the housework and we will be eating____41____food. A lot of people think that we might only cook for fun in the future. Space exploration will become increasingly____42____. Fifty percent of the people we talked to ____43____that man will regularly (定期地) visit Mars.
Pollution is something that seems to ____44____many people. Some fear that it will____45____to get worse, and that our planet will become____46____to live on. Others even ____47____that one day we' ll have to pay for clean air.
____48____, people seem to be quite optimistic about genetic engineering (基因工程), as they think scientists will use it to ____49____diseases like cancer and AIDS.
No matter how dark or bright it may seem, it is up to us to 50____our planet and try to make it a better place.
31．A．education B．life C．nature D．space
32．A．hopes B．tears C．rights D．plans
33．A．marriage B．leadership C．friendship D．neighborhood
34．A．private B．perfect C．necessary D．expensive
35．A．however B．instead C．anyhow D．therefore
36．A．until B．unless C．because D．although
37．A．provide B．complete C．receive D．change
38．A．facts B．abilities C．goals D．thoughts
39．A．end B．past C．moment D．future
40．A．busier B．safer C．sadder D．easier
41．A．unhealthy B．frozen C．over-cooked D．ready-made
42．A．famous B．cheap C．popular D．difficult
43．A．doubt B．believe C．remember D．warn
44．A．confuse B．frighten C．satisfy D．worry
45．A．stop B．continue C．refuse D．begin
46．A．cold B．impossible C．suitable D．free
47．A．expect B．promise C．predict D．wish
48．A．As a result B．In other words C．In a similar way D．On the other hand
49．A．catch B．spread C．prevent D．carry
50．A．take over B．look after C．pay for D．think about

（2021·全国·高二单元测试）What will man be like in the future? How about in 5,000 or even 50,000 years from now? We can only make a____51____, of course, but we can be sure that he will be different from____52____he is today, for man is slowly____53____all the time.
Let us take an example. Man, even 500 years ago, was____54____than he is today. Now, on average, men are about three inches taller. 500 years is a relatively short period of____55____, so we may guess that man will____56____to grow taller.
Again, in modern world we use our____57____a great deal. Even so, we still____58____only about 20% of the brain’ s capacity (容量).As time____59____, however, we shall have to use our brains more and more --and finally we shall need even larger ones! This is likely to____60____a physical change, too. The head,____61____, the forehead, will grow larger.
Nowadays our eyes are in____62____use. In fact, we use them so much that very often they become weaker and we have to wear____63____. But over a very long period of time it is likely that man’s eyes will grow stronger.
On the other hand, we____64____to make less use of our arms and legs. These, as a result, are likely to grow weaker. At the same time,____65____our fingers will grow more sensitive (敏感的) because they are used a great deal in modern life.
But what about hair? This will probably____66____from the body altogether in course of time because it does not____67____a useful purpose any longer. In the future, then, both sexes are likely to be bald(无发或少发的).
Perhaps all this gives the impression that future man will not be a very____68____creature to look at! All the same, in spite of all these changes, future man will still have a lot in____69____with us. He will still be a human being, with____70____and emotions similar to our own.
51．A．guess B．research C．joke D．decision
52．A．what B．how C．that D．which
53．A．dying B．changing C．growing D．improving
54．A．longer B．taller C．bigger D．shorter
55．A．journey B．life C．time D．distance
56．A．stop B．continue C．keep D．hope
57．A．minds B．heads C．brains D．hearts
58．A．occupy B．choose C．control D．use
59．A．passes down B．goes on C．moves away D．runs out
60．A．cause B．take C．occur D．lead
61．A．in total B．in trouble C．in particular D．in charge
62．A．constant B．practical C．proper D．suitable
63．A．hats B．smiles C．clothes D．glasses
64．A．plan B．mean C．tend D．decide
65．A．therefore B．however C．otherwise D．besides
66．A．grow B．appear C．disappear D．survive
67．A．have B．keep C．hold D．serve
68．A．attractive B．ugly C．special D．ordinary
69．A．size B．difference C．appearance D．common
70．A．bodies B．thoughts C．mouths D．noses

（2021·吉林·长春市第二十九中学高二阶段练习）When I was a boy I dreamed of my future. I was going to be a cowboy. Then I dreamed of being a fire fighter and ____71____ people from burning buildings. I just couldn’t ____72____ to grow up and be an adult. After I went to college and those dreams ____73____. I thought I would be a scientist, then I switched to being a teacher. When I ____74____ and had children, my dreams of the future changed again. Now it wasn’t so much a ____75____ career that I dreamed of but a time when I could be settled and ____76____ and my family and I would finally be problem free.
That dream, of course, didn’t ____77____. In fact, none of those dreams ever came to life. It took me many years as well to ____78____ that living in a dream future was living in a ____79____ and that each moment I spent there was taking a moment away from the _____80_____ NOW. I saw that there could be no perfect problem free future because problems are a part of _____81_____.
It is only in the NOW that we can truly live. Our dreams for the future are just that: _____82_____. Whether they come true or not isn’t as _____83_____ as how we live each day here. A hug shared today can never be _____84_____. An act of kindness not given now is lost forever. A moment of love missed can never be _____85_____ again. Each second of the NOW is precious and priceless. Don’t waste a one of them.
71．A．liberating B．carrying C．rescuing D．supporting
72．A．wait B．stop C．stay D．rest
73．A．remained B．matched C．broke D．changed
74．A．retired B．married C．succeeded D．divorced
75．A．certain B．firm C．promising D．professional
76．A．silent B．gentle C．secure D．uncertain
77．A．lose B．happen C．produce D．destroy
78．A．recognize B．appreciate C．conclude D．realize
79．A．hope B．fantasy C．fable D．vision
80．A．precious B．favorite C．common D．popular
81．A．activity B．movement C．life D．business
82．A．realities B．dreams C．purposes D．treasures
83．A．famous B．serious C．impressive D．important
84．A．replaced B．followed C．recovered D．reviewed
85．A．picked up B．broken up C．made up D．put up

（2020·全国·高二专题练习）Finding Home
“I hate New Orleans! I wanna go home!” I ___86___ to my mother as we moved boxes. ___87___, going home was not easy because my home was 1, 100 miles away.
I was born and ___88___ in northern Virginia. Virginia was my home, and I never expected that to ___89___. In 2014, my family experienced a tragedy (悲剧), so my parents decided to move to my mom’s hometown of New Orleans.
Only three months after my parents made the ___90___ to move, I found myself moving boxes into our new house. My announcement to my mother that I ___91___ the new environment was partly motivated by how hot it was, but it was mostly due to the fact that I felt like my entire life had been turned upside down. 1,100 miles away from everyone and everything I had ever known, I was ___92___. To make matters worse, I was starting high school in two weeks Beginning high school is a scary ___93___ on its own.
I spent my first few months in New Orleans, ___94___ wanting to go home to Virginia. But after a few months of missing home, I ____95____ that I had a choice. I could continue thinking about how much I missed my old home, ____96____ I could start trying to build a new home right here. I chose the latter.
As soon as I stoppe