Unit 2 单元话题完形填空专项练习-2022-2023学年高二英语选择性必修第一册单元重难点易错题精练（人教版2019）

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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 withB．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

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