By the middle of the 21st century, the vast m...

By the middle of the 21^st century, the vast majority of the world’s population _____ in cities rather than in the country.

A．are living          B．will be living        C．have lived         D．will have lived

高二英语单项填空中等难度题查看答案及解析

The vast majority of us spend our entire lives pulled down by gravity. Then there are astronauts.

This small population of space travelers has given researchers a rare look at what happens to the human body when it’s able to spend large amounts of time outside the downward pull of the Earth. This week, a study on one of the largest groups of astronauts yet ---34 participants---was published in The New England Journal of Medicine.

In the new study, a team of international radiologists supported by NASA looked at MRIs of the brains of astronauts before and after their trips to space. The scientists found that upon returning to Earth, many of the astronauts’ brains had become repositioned inside their skulls, floating higher than before. In addition, the space between certain brain areas appeared to have shrunk. The changes were more common in astronauts who took longer trips into space.

The team characterized astronaut trips as short (an average of less than 14 days) or long (an average of about 165 days). Radiologists who didn't know each astronaut's duration（持续时间）in space compared MRIs from before and after their trips.

Of the 34 total astronauts involved in the study, 18 took long trips to space—spending most of that time on the International Space Station —and of those, 17 returned to Earth with smaller areas between the frontal lobe（脑前额叶）and parietal lobe（顶叶）. The same area of the brain also shrank for three of the 16 astronauts who took shorter trips with the US Space Shuttle Program. The researchers also found that 12 of the ISS astronauts and six of the space-shuttle astronauts returned home with their brains sitting slightly higher in their skulls than before.

It’s not clear what, if anything, these brain changes mean for the health of space travelers. In general, it appears the human body tolerates space travel fairly well: the time astronauts have spent in zero-gravity environments so far doesn’t seem to have had any strong or long-lasting effects.

1.What is the finding of the study?

A. Astronauts have great brain power.

B. Astronauts’ duration in space is updated.

C. Astronauts’ skulls expand after space trips.

D. Astronauts return to Earth with raised brains.

2.How did the scientists draw the conclusion?

A. By analyzing astronauts’ symptoms.

B. By comparing each astronaut’s MRIs.

C. By monitoring astronauts’ brain activities.

D. By observing countless astronauts’ behaviors.

3.What does the author say about the changes inside astronauts’ skulls?

A. They are totally harmless.

B. Their effects are hard to assess.

C. Their occurrence is unavoidable.

D. They will heavily influence astronauts.

4.What is the best title for the text?

A. Effects of zero gravity

B. Valuable experiences of space travel

C. Space travel changes astronauts’ brains

D. Flying long house increases health risks

高二英语阅读理解中等难度题查看答案及解析

The Pacific region will be one of the fastest growing areas in the world in the 21st century. ______ shouldn’t be any doubt about it now.

高二英语单项填空简单题查看答案及解析

“Nomophobia”, NO Mobile Phone phobia(恐惧) is a 21st-century term for the fear of not being able to use your smartphone. Smartphone addiction is on the rise, surveys show, and a new study released adds to a growing body of evidence that smartphone addiction is harming our minds literally.

Smartphone addiction affects many people from all across the globe. Over 1.8 billion people own smartphones and the average owners check their screens 150 times a day. Considering those numbers, it shouldn’t come as a surprise when 44% of people (compared with 20% in 2011) admit feeling anxious when they can’t have access to their phones.

Researchers from Harvard University used brain imaging to study the brains of 19 teenage boys who were diagnosed with smartphone addiction. Compared with 19 teenagers who were not addicted, the brains of the addicted boys had significantly higher levels of GABA, which decelerates neurons (神经元)， than levels of glutamate-glutamine, which energizes brain signals. That results in poorer attention and control, which you don’t want to have, because you want to stay focused. So that means you are easier to get distracted.

“Addicted teenagers in the study also had significantly higher scores in anxiety, depression and levels of impulsiveness (冲动) ,” said Dr. Leslie Perlow, who led the study.

If you seem to have the symptoms of smart device addiction, experts have some suggestions in addition to mindfulness training. First, turn off your phone at certain times of the day, such as in meetings, when having dinner, playing with your kids, and of course, driving. Remove social media apps, like Facebook and Twitter from your phone, and only check-in from your laptop. Try to stop yourself to 15-minute intervals at set times of the day when it won’t affect work or family life. Don’t bring your cellphone and its harmful blue light to bed, and use an old-fashioned alarm to wake you. And last, try to replace your smart device time with healthier activities such as meditating or actually interacting with real people.

1.What is the conclusion of the research?

A.Smartphone addiction leads to distraction.

B.Smartphone addiction easily causes anger.

C.Smartphone addiction is harmful to the mind.

D.Smartphone addiction brings about anxiety and depression.

2.Where can you find the data that best supports smartphone addiction is on the rise?

A.In Paragraph 2. B.In Paragraph 3.

C.In Paragraph 4. D.In Paragraph 5.

3.Which of the following can replace the underlined word “decelerates” in Paragraph 3?

A.Speeds up. B.Slows down.

C.Adds to. D.Cuts down.

4.Which of the suggestions is encouraged according to the text?

A.To use an old-fashion cellphone. B.To participate in more social activities.

C.To stop fifteen-minute intervals. D.To turn off the blue light on bed.

高二英语阅读理解中等难度题查看答案及解析

书面表达（满分25分）

最近的一项研究表明，北京大约有50%青少年有不吃早餐的习惯。请根据表格内容用英语写一篇题为 “Top Meal of the Day”的短文刊登在 21^st Century 报上。

注意：①.　短文须包括所有要点，可以适当增加情节，使内容连惯。

②.   词数100 – 120.

③.   参考词汇： slim 苗条的　　creative 创造性的

高二英语书面表达简单题查看答案及解析

最近的一项研究表明，大约有50％的青少年没有吃早餐的习惯。请根据表格内容用英语写一篇题为“Top Meal of the Day”的短文刊登在21st Century上。

原因 1、学习太晚，多睡一会。

2、家长太忙，给钱让孩子自己解决。

3、女孩子保持苗条身材。

结果 1、课堂上睡觉。2、注意力下降。3、成绩不理想。

建议 …….

注意： 1．词数：120左右。

2．不要逐字翻译，要点可适当发挥。

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高二英语书面表达中等难度题查看答案及解析

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。选项中的两项为多余选项。

Urbanization

Until relatively recently, the vast majority of human being lived and died without ever seeing a city. The first city was probably founded no more than 5,500 years ago. _1._ In fact, nearly everyone lived on farms or in tiny rural (乡村的) villages. It was not until the 20th century that Great Britain became the first urban society in history—a society in which the majority of people live in cities and do not farm for a living.

Britain was only the beginning. _2.__ The process of urbanization—the migration (迁徙) of people from the countryside to the city—was the result of modernization, which has rapidly transformed how people live and where they live.

In 1900, fewer than 40% of Americans lived in urban areas. Today, over 82% of Americans live in cities. Only about 2% live on farms. __3.__

Large cities were impossible until agriculture became industrialized. Even in advanced agricultural societies, it took about ninety­five people on farms to feed five people in cities.__ 4.__ Until modern times, those living in cities were mainly the ruling elite (精英) and the servants, laborers and professionals who served them. Cities survived by taxing farmers and were limited in size by the amount of surplus（过剩）food that the rural population produced and by the ability to move this surplus from farm to city.

Over the past two centuries, the Industrial Revolution has broken this balance between the city and the country.__ 5._ Today, instead of needing ninety­five farmers to feed five city people, one American farmer is able to feed more than a hundred non­farmers.

A．That kept cities very small.

B．The rest live in small towns.

C．The effects of urban living on people should be considered

D．Soon many other industrial nations became urban societies.

E．But even 200 years ago, only a few people could live in cities.

F．Modernization drew people to the cities and made farmers more productive.

G．Modern cities have destroyed social relations and the health of human beings.

高二英语七选五中等难度题查看答案及解析

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。选项中的两项为多余选项。UrbanizationUntil relatively recently, the vast majority of human being lived and died without ever seeing a city. The first city was probably founded no more than 5,500 years ago.1.In fact, nearly everyone lived on farms or in tiny rural (乡村的) villages. It was not until the 20th century that Great Britain became the first urban society in history—a society in which the majority of people live in cities and do not farm for a living.Britain was only the beginning.2.The process of urbanization—the migration (迁徙) of people from the countryside to the city—was the result of modernization, which has rapidly transformed how people live and where they live.In 1900, fewer than 40% of Americans lived in urban areas. Today, over 82% of Americans live in cities. Only about 2% live on farms.3.Large cities were impossible until agriculture became industrialized. Even in advanced agricultural societies, it took about ninety­five people on farms to feed five people in cities.4.Until modern times, those living in cities were mainly the ruling elite (精英) and the servants, laborers and professionals who served them. Cities survived by taxing farmers and were limited in size by the amount of surplus（过剩）food that the rural population produced and by the ability to move this surplus from farm to city.Over the past two centuries, the Industrial Revolution has broken this balance between the city and the country.5.Today, instead of needing ninety­five farmers to feed five city people, one American farmer is able to feed more than a hundred non­farmers.

高二英语阅读理解中等难度题查看答案及解析

阅读理解

阅读下列四篇短文，从每小题后所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该选项涂黑。

The vast majority of fitness trackers count your steps and are worn around the wrist, but now there’s a device that’s designed to be worn like a necklace and monitors tiny movements to improve your posture.

The Fineck device aims to address neck pain by tracking tiny movement, spotting bad habits and suggesting exercises via an accompanying app. Made from silicone(硅)and titanium(钛), Fineck monitors a wearer’s movement, balance, posture and movement thanks to sensors inside. The Mountain View California-based firm says that a high percentage of people suffer from neck pain and associated problems, probably caused by more individuals doing office jobs, which generally involve leaning over computer keyboard.

The device contains sensors, several different types of instruments to monitor movement, plus a monitor to shake. It connects to an IOS app via Bluetooth so that wearers can see their bad habits and play “neck training” games. The app warns of health risks and records a user’s activity to build up a customer personal health description. The necklace shakes to give smart advice, such as reminding wearers to sit up straight. The app also allows users to set goals, like many other wearables do. “Fineck is the first wearable device for your neck that tracks your neck activity and warn you when you are in a bad posture for too long. You can also exercise your neck with Fineck’s interactive games.” The company writes on Kickstarter. “No matter where you are and what you are doing at office, on the go, or simply just feeling bored, Fineck will bring you enriched exercise experience through motion sensing games and therapies.”

It also claims that it is “the world’s first titanium wearable device”. The metal is widely used in fashion stuff that you can wear or carry to match your clothes because it is lightweight, durable and does not tend to cause allergic(过敏的)reactions. It also offers additional features such as shaking to indicate alerts on a user’s smartphone, but it is not currently clear whether it can also be used like bands, to count steps, and so on.

The Fineck has a battery life of around seven days and takes one hour to charge. It is available to pre-order via Kickstarter from ＄69(￡44)and is due to ship in March next year.

1.What helps the Fineck device to deal with neck pain?

A. An accompanying app.　　　　　　　　　　　　 B. A necklace

C. Computer keyboard.　　　　　　　　　　　　　 D. A remote control

2.Besides allowing people to set goals, the iOS app also_____.

A. improves your posture and suggests exercises

B. exercise your neck and does office jobs

C. alerts you to health risk and records your activity

D. counts your steps and addresses neck pain

3.Which of the following statements is true?

A. The Fineck takes an hour to charge and is available at any time.

B. Movie stars like to wear necklace made of silicone to match their clothes.

C. The device count the steps to help wearers to see their bad habits.

D. Neck-ache is something caused by using computers too much.

4. We can infer from the passage that the Fineck device will_____.

A. actually not cause allergic reactions.

B. enrich your life by providing “neck training” games

C. monitor a wearer’s movement due to the material it is made of

D. help to correct your improper postures

高二英语阅读理解中等难度题查看答案及解析

On my 21st birthday, my mother gifted me a pair of beautiful bangles (手镯). They were the gift __ by my granny, and my mom got it at my age. Besides the feelings they are concerned with, these bangles spread their __ in another way: They are studded (点缀) with heart-shaped stones.

Till now, the memory of these bangles always makes me __. It is the best gift that I have ever got, although there is a pity. One day, I found one of the bangles had its studded stones missing. To __ it, I went out on a cold afternoon to the jewelry shop. All the way, I was lost in my __, wondering whether the jeweler could make it as the same as it was. __, when reaching the shop, I couldn’t find the bangle anywhere. Tears filled my eyes then and it took me weeks to __ this sadness.

Two years later I left the city but the accident __ troubled me from time to time. However, twenty years later I was again in the city. One day I went out to __ strawberries. The seller was a young lady. While talking with her, I __ saw her hand. She was wearing the ___bangle that I lost years ago. So I asked her how she __ it. She started sobbing (呜咽)，“This is a special gift from my late (已故的）father. Many years ago, my father picked it up on the roadside __ I said, “The bangle is mine,” and I told her the whole __. After hearing that, she __ me and tried to pull out that bangle to give it back to me, but I __ her. I said, I know the __ of losing the things from our loved ones. I don’t want to do the same to you. If you __ it，I will be happier.” We exchanged smiles in silence, and then I left the place. I wasn’t __ at all. I believe that sometimes “you can’t gain much without __ a bit.” This is what I have learned from the lost bangle.

1.A.created B.shown C.given D.booked

2.A.light B.color C.usage D.beauty

3.A.excited B.crazy C.upset D.calm

4.A.sell B.wash C.exchange D.repair

5.A.plan B.thought C.dream D.joy

6.A.Therefore B.Meanwhile C.However D.Otherwise

7.A.understand B.overcome C.hide D.enjoy

8.A.never B.still C.ever D.even

9.A.buy B.collect C.plant D.water

10.A.suddenly B.gradually C.patiently D.unfortunately

11.A.new B.strange C.common D.same

12.A.noticed B.checked C.won D.got

13.A.by chance B.by mistake C.on purpose D.on time

14.A.story B.speech C.experiment D.report

15.A.refused B.trusted C.watched D.touched

16.A.followed B.warned C.praised D.stopped

17.A.honor B.pain C.importance D.embarrassment

18.A.change B.ignore C.keep D.return

19.A.nervous B.disappointed C.pleased D.grateful

20.A.losing B.remembering C.protecting D.destroying

高二英语完形填空中等难度题查看答案及解析