For thousands of years, we have looked for wa...

For thousands of years，we have looked for ways to measure time. Early humans found that the regular movements of the sun，the earth，the moon，and the stars made good ways to measure time. The rising and setting of the sun were used to distinguish day from night.

But，eventually，people needed to tell time more accurately，or exactly. So，by using the sun’s position in the sky，they divided the day into dawn，morning，midday and evening.

Then it was noted that the sun cast a changing shadow as it moved across the sky. Time could be told more accurately by setting up a stick and marking the positions of the sun’s shadow. It was the ancient Greeks who divided each position of this “sundial(日晷)” into hours.

But the sun doesn’t always shine. So，for the past 6,000 years，many other ways of keeping time have been tried. Slow­burning candles were divided into hours，and the hourglass was invented. When all the sand in the top of an hourglass has shifted to the bottom，an hour has passed.

Later，the pendulum(摆钟)，with its regular back­and­forth movement of weights，was used to move the hands on a clock. Pendulums are still used in grandfather clocks.

Today，even more accurate clocks are in use，such as battery­operated quartz clocks（石英钟），digital clocks，and clocks run by electrical tuning forks and tiny atoms. These atomic clocks are the most accurate clocks ever invented. The exact time can be kept to within 1 second a century.

1.Humans in the old days used ________ to tell day from night.

A．the rising and setting of the sun

B．battery­operated quartz clocks

C．atomic clocks

D．digital clocks

2.A sundial works by ________.

A．tracking the movement of the stars around the sun

B．marking a shadow cast by the moving sun

C．burning candles in the sunlight

D．watching the stars

3.Which of the following was NOT used in the past to measure time?

A．An hourglass.　　　　　　　　　　 B．A sundial.

C．Digital clocks.　 　　　　　　　　　 D．A pendulum.

4.Which of the following ways of measuring time is ordered from the least accurate to the most accurate?

A．Sundial，pendulum，sun.

B．Atomic clock，quartz clock，sundial.

C．Sun，pendulum，atomic clock.

D．Digital clock，hourglass，slow­burning candles.

高一英语阅读理解中等难度题查看答案及解析

For thousands of years, we have looked for ways to measure time. Early humans found that the regular movements of the sun, the earth> the moon, and the stars made good ways to measure time. The rising and setting of the sun were used to distinguish (辨别) day from night.

But, eventually, people needed to tell time more accurately, or exactly. So, by using the sun’s position in the sky, they divided the day into dawn, morning, midday and evening.

Then it was noted that the sun cast a changing shadow as it moved across the sky. Time could be told more accurately by setting up a stick and marking the positions of the sun’s shadow. It was the ancient Greeks who divided each position of this “sundial (日晷)” into hours.

But the sun doesn’t always shine. So, for the past 6,000 years, many other ways of keeping time have been tried. Slow-burning candles were divided into hours, and the hourglass was invented. When all the sand in the top of an hourglass has shifted to the bottom, an hour has passed.

Later, the pendulum (摆钟), with its regular back-and-forth movement of weights, was used to move the hands on a clock. Pendulums are still used in grandfather clocks.

Today, even more accurate clocks are in use, such as battery-operated quartz clocks (石英钟), digital clocks, and clocks run by electrical tuning forks and tiny atoms. These atomic clocks are the most accurate clocks ever invented. The exact time can be kept to within 1 second a century.

1.Humans in the old days used 　　　　 to tell day from night.

A. the rising and setting of the sun

B. battery-operated quartz clocks

C. atomic clocks

D. digital clocks

2.A sundial works by 　　　　 .

A. tracking the movement of the stars around the sun

B. marking a shadow cast by the moving sun

C. burning candles in the sunlight

D. watching the stars

3.Which of the following was NOT used in the past to measure time?

A. An hourglass.　　 B. A sundial.

C. Digital clocks.　　 D. A pendulum.

4.Which of the following ways of measuring time is ordered from the least accurate to the most accurate?

A. Sundial, pendulum, sun.

B. Atomic clock, quartz clock, sundial.

C. Sun, pendulum, atomic clock.

D. Digital clock, hourglass, slow-burning candles.

高一英语阅读理解中等难度题查看答案及解析

For thousands of years, people have known that the best way to understand a concept is to explain it to others. “While we teach, we _______, ”said Roman philosopher Seneca. Now scientists are bringing this ancient _______ up-to-date. They’re _______ why teaching is such a fruitful way to learn.

Researchers have found that students who teach others work harder to _______ the material, and apply it more _______. Student teachers score higher on tests than pupils who’re learning only for themselves. But how can children, _______ learning themselves, teach others? One answer: They can teach younger kids. Some studies have found that first-born children are more _______ than their later-born siblings(兄弟姐妹). This _______ their higher IQs result from the time they spend teaching their siblings.

Now educators are experimenting with ways to _______ this model to schoolwork. They engage college undergraduates to teach computer science to high school students, who then ________ instruct middle school students on the ________. But the most cutting-edge tool is the “teachable agent”—a computerized character who learns, tries, makes mistakes and asks questions just like a real-world ________. Computer scientists have ________ an animated(动画的) figure called Betty’s Brain, who has been “taught” about science by middle school student. Student teachers are motivated to help Betty ________ certain materials. While preparing to teach, they organize their knowledge and ________ their understanding. And as they explain the information to it, they identify problems in their own ________.

Feedback from the teachable agent ________ improves the teachers’ learning. The agents’ questions drive student teachers to think and explain the materials in different ________, and watching the agent solve problems allows them emotions one experiences into action. ________, it’s the emotions one experiences in teaching that help learning. Student teachers feel ________ when their teachable agents fail, but happy when these pupils succeed as they gain pride and satisfaction from someone else’s achievement.

1.A.learn B.doubt C.grow D.practice

2.A.tale B.lesson C.wisdom D.riddle

3.A.valuing B.proving C.questioning D.assuming

4.A.prepare B.preserve C.exchange D.understand

5.A.officially B.effectively C.fluently D.carefully

6.A.still B.even C.though D.once

7.A.curious B.energetic C.independent D.academic

8.A.approves B.witnesses C.suggests D.reviews

9.A.add B.apply C.offer D.show

10.A.as well B.at once C.in turn D.of course

11.A.topic B.event C.schedule D.experiment

12.A.teacher B.parent C.sibling D.pupil

13.A.created B.tended C.invited D.reserved

14.A.arrange B.mark C.master D.link

15.A.keep B.improve C.drop D.reach

16.A.thinking B.reading C.inspiration D.guidance

17.A.shortly B.hardly C.rather D.further

18.A.ways B.cases C.places D.orders

19.A.In all B.After all C.Above all D.For all

20.A.satisfied B.sick C.pleased D.upset

高一英语完形填空中等难度题查看答案及解析

For thousands of years, people have known that the best way to understand a concept is to explain it to others.“While we teach, we __，”said Roman philosopher Seneca. Now scientists are bringing this ancient __up-to-date. They're __why teaching is such a fruitful way to learn

Researchers have found that students who teach others work harder to __the material, and apply it more __. Student teachers score higher on tests than pupils who're learning only for themselves. But how can children,__learning themselves, teach others? One answer: They can teach younger kids. Some studies have found that first-born children are more __than their later-born siblings (兄弟姐妹)，This__their higher IQs result from the time they spend teaching their siblings.

Now educators are experimenting with ways to__ this model to schoolwork. They engage college undergraduates to teach computer science to high school students, who then __ instruct middle school students on the __. But the most cutting-edge tool is the “teachable agent”-a computerized character who learns, tries, makes mistakes and asks questions just like a real-world__. Computer scientists have __ an animated(动画的)figure called Betty's Brain, who has been“taught” about science by middle school stints. Student teachers are motivated to help Betty __ certain materials. While preparing to teach, they organize their knowledge and__ their understanding. And as they explain the information to it, they identify problems in their own__.

Feedback from the teachable agent __improves the teachers' learning. The agents' questions drive student teachers to think and explain the materials in different __,and watching the agent solve problems allows them emotions one experiences into action.__,it’s the emotions one experiences in teaching that help learning. Student teachers feel __ when their teachable agents fail, but happy when these pupils succeed as they gain pride and satisfaction from someone else’s achievement.

1.A. learn　　 B. doubt　　 C. grow　　 D. practice

2.A. tale　　 B. lesson　　 C. wisdom　　 D. riddle

3.A. valuing　　 B. proving　　 C. questioning　　 D. assuming

4.A. prepare　　 B. preserve　　 C. exchange　　 D. understand

5.A. officially　　 B. effectively　　 C. fluently　　 D. carefully

6.A. still　　 B. even　　 C. though　　 D. once

7.A. curious　　 B. energetic　　 C. independent　　 D. academic

8.A. approves　　 B. witnesses　　 C. suggests　　 D. reviews

9.A. add　　 B. apply　　 C. offer　　 D. show

10.A. as well　　 B. at once　　 C. in turn　　 D. of course

11.A. topic　　 B. event　　 C. schedule　　 D. experiment

12.A. teacher　　 B. parent　　 C. sibling　　 D. pupil

13.A. created　　 B. tended　　 C. invited　　 D. reserved

14.A. arrange　　 B. mark　　 C. master　　 D. link

15.A. keep　　 B. improve　　 C. drop　　 D. reach

16.A. thinking　　 B. reading　　 C. inspiration　　 D. guidance

17.A. shortly　　 B. hardly　　 C. rather　　 D. further

18.A. ways　　 B. cases　　 C. places　　 D. orders

19.A. In all　　 B. After all　　 C. Above all　　 D. For all

20.A. satisfied　　 B. sick　　 C. pleased　　 D. upset

高一英语完形填空中等难度题查看答案及解析

We human beings haven’t been good friends to animals. For thousands of years, we have been polluting the environment, making it hard for animals to live on the planet. We have been killing animals for their fur, feathers or meat, or simply because they are dangerous. As a result, many kinds of animals have disappeared forever. Hundreds more are on the endangered list today.

Should we care about animals? Of course we should. If animals of a certain kind all disappear, they will never come back again. Animals are more than just resources of things we need. Every kind of animal has its place in the balance of nature. Destroying any kind of animal can lead to many problems. For example, when farmers killed large numbers of hawks(鹰), the corn and grain that the farmers stored were destroyed by rats and mice. Why? Because hawks eat rats and mice. With less and less hawks to keep down their numbers, rats and mice multiplied(繁殖) quickly. And if people kill too many birds, more and more insects will eat the crops.

Luckily, we’ve realized that we shouldn’t kill animals any more. And people are working hard to save those animals that would disappear soon. The government also passed laws to protect the endangered animals. In fact, quite a few countries have passed such laws. These laws forbid the killing of any kind of animal on the endangered list. We should try our best to protect and save the endangered animals.

1.The text calls on us to__________.

A. protect the endangered animals.

B. find out more about the balance of nature.

C. keep animals grow quickly.

D. protect the environment.

2.The example that farmers killed hawks shows that__________.

A. there were too many rats and mice

B. animals are very beautiful and interesting.

C. every kind of animal is important in nature .

D. animals are good food resources

3.What is the author’s attitude towards the future of endangered animals ?

A. Doubtful　　 B. Uncaring　　 C. Optimistic　　 D. Negative

高一英语阅读理解中等难度题查看答案及解析

We have spent thousands of years fighting for our survival. Yet now we have ____ that our planet is under threat. It’s time we woke up to the problems and started repairing the ____.

One of the major problems is the destruction of the rainforests in South America. They are ____ to half the world’s species and to millions of people. Moreover, the rainforests ____ the air by taking in carbon dioxide and giving out oxygen. The trees are being ____ for paper or to make room for cattle farms. So birds and animals ____ their homes and die. This destruction is also bringing about ____ in the climate, air pollution and flooding. If we ____ to burn and cut down the rainforests as we are doing now, the earth will ____ be the same.

Another big ____ is water pollution. Factories are ____ our rivers and lakes with dangerous chemicals. Tons and tons of waste are poured into our seas. ____, sea life is in danger.

___ pollution is another important issue. The cars and factories in and around our cities are giving off ____ gases. In the past few years, more and more people than ever before have breathing problems. If we don’t do something now, our cities will become ____ to live in.

___, it is not too late to solve these problems. We have the time, the money and even the technology to prepare the way for a better, cleaner and ____ future. We can plant trees and create parks for the species in danger. We can put pressure on those in power to ____. Together we can ____ our planet. All we need to do is open our eyes and act ____.

1.A.discovered B.guessed C.predicted D.forgotten

2.A.bridge B.image C.damage D.relationship

3.A.secret B.home C.hope D.belief

4.A.need B.heat C.clean D.produce

5.A.burned B.looked after C.planted D.cut down

6.A.find B.visit C.lose D.leave

7.A.changes B.recoveries C.differences D.improvements

8.A.fail B.start C.stop D.continue

9.A.still B.never C.always D.almost

10.A.choice B.problem C.goal D.view

11.A.sharing B.providing C.polluting D.connecting

12.A.For example B.As usual C.On the whole D.As a result

13.A.Air B.Noise C.Light D.Soil

14.A.pleasant B.unknown C.useless D.harmful

15.A.impossible B.illegal C.crowded D.healthy

16.A.Surprisingly B.Fortunately C.Interestingly D.Strangely

17.A.bigger B.safer C.longer D.simpler

18.A.take care B.take turns C.take risks D.take action

19.A.feed B.observe C.save D.destroy

20.A.immediately B.patiently C.politely D.slowly

高一英语完形填空困难题查看答案及解析

For thousands of years, people thought of glass as something beautiful to look at. Only in large glass windows. Glass bottles and jars that hold food and drink allow us to see the contents. Glass is used to make eyeglasses, microscopes, telescopes, and many other extremely useful and necessary things.

Until the Second World War, most of the glass used for optical (光学的) instruments was imported from Europe. However, during the war Americans could not get European glass, and they were forced to make their own. Therefore, new kinds of glass were developed that had been previously unknown. These new effects were achieved by mixing other chemical elements with the sand. Some of the new glass is very strong and can resist many kinds of shocks. Legend (传说) has it that a kind of very hard glass was invented by a Roman who showed his discovery to the Emperor. When the Emperor saw the glass he feared that it would become more valuable than gold and sliver, making his treasure worthless. Therefore, he had the glass-maker killed, and the secret was not discovered again for hundreds of years.

In the present century, safety glass was invented for use in modem cars and planes. Safety glass is made by placing a layer of plastic between two layers of plate glass. When the outside layer of glass is broken, the pieces do not scatter (散开) and injure people. Some glass of the type is strong enough to resist bullets (子弹).

Although nowadays plastics have replaced glass under conditions where glass might be easily broken, there are new uses being developed, for the greatest advantage of glass is that its component (组成的) parts are inexpensive and can be found all over the world.

1.As time goes by glass________.

A. is seen as more than decoration (装饰).

B. is used to make things look pleasant

C. is regarded as transparent (透明的).

D. is widely used to replace steel in making containers

2.Why did Americans make their own glass during the Second World War?

A. They were able to make a new kind of glass.

B. The glass made in Europe was out of date.

C. They refused to use the European glass.

D. The war blocked the way of glass import.

3.Why does the author tell us the legend?

A. To prove the Roman was the first inventor of hard glass.

B. To give some information about hard glass.

C. To support the Americans were as clever as the Romans.

D. To provide a historical event concerned with hard glass.

4.Why are new uses of glass being developed?

A. Because glass is not as safe as plastics.

B. Because glass is not as strong and durable as plastics.

C. Because glass is cheap and easily found.

D. Because glass is more and more widely used.

高一英语阅读理解中等难度题查看答案及解析

When times get tough, we all look for ways to cut back. When we’re hungry, we eat at home instead of going out. We take buses instead of taxis. And we wear our old designer jeans just a few months longer. With college expenses at all-time highs, high school students are eager to do anything to cut the cost of a university education.

One cost-cutting proposal is to allow college students to get a bachelor’s degree in three years instead of four. Educational institutions have been actively exploring ways to make the learning process more efficient. But there’s a question: Would the quality of undergraduate education suffer? Few US universities have formally approved a “three-year degree” model.

I doubt that mainstream North American colleges will carry out a three-year curriculum any time soon. For one thing, most universities already allow highly qualified students to graduate early by testing out of certain classes and obtaining a number of college credits. In addition, at famous universities, the committee who determine which courses are required and which courses are electives are unlikely to suddenly “throw out” one quarter of the required credits. Professors will resist “diluting(稀释)”the quality of the education they offer.

In my opinion, a quality four-year education is always superior to a quality three-year education. A college education requires sufficient time for a student to become skilled in their major and do coursework in fields outside their major. It is not a good idea to water down education, any more than it’s not a good idea to water down medicine. If we want to help students find their way through university, we should help them understand early on what knowledge and skills they need to have upon graduation. We should allow students to test out of as many courses as possible. We should give them a chance to earn money as interns(实习生)in meaningful part-time jobs that relate to their university studies, such as the five-year co-op program at Northeastern University.

1.Which of the following can be the best title?

A. It’s time to shorten the learning process

B. Best learning takes place over time

C. University education should be watered down

D. College education calls for reform

2.In most US universities, ________ .

A. some excellent students can graduate ahead of time

B. college students are offered the co-op program

C. electives’ credits make up one quarter of the required credits

D. all students are required to finish four-year education before graduation

3.We can infer that ________ .

A. the author is a college professor

B. the author considers the university education quality very important

C. the author thinks the cost of a university education is too high for people to afford

D. the author pays special attention to the all-round development of college students

4.The first paragraph serves as a(n) ________ .

A. explanation　　 B. Definition　　 C. Comment　　 D. introduction

高一英语阅读理解中等难度题查看答案及解析

For millions of years, coral reefs（珊瑚礁）have provided homes and food for thousands of different living things. Fish and sea birds share the reef with other creatures. Now these beautiful places are in danger. 　　 1.　　 Scientists have found that more than one-fourth of the earth’s coral reefs have been ruined so far. Another quarter will disappear in ten years’ time. Unless things change, all of the remaining reefs may die within your lifetime.

Some people think that coral is stone because of its rough（粗糙的）, hard surface. But coral is an animal. Tiny polyps（水螅体）form the coral reefs. 　　 2.　 These colors come from the algae（海藻）living inside the coral. Billions of coral polyps stick together. New ones grow on the dead ones. This happens year after year. Over time, the coral builds up a reef. The reef rises from the ocean floor until it almost reaches the sea’s surface. It takes coral 500,000 years to build a huge reef. 　 3.

The coral reefs have been harmed mainly in three ways. The first factor is pollution on land. The pollutants run with rainwater into streams and rivers, which carry the poisons into the ocean. 4.　　 So they will be easily infected with diseases. Another cause is people. People have broken off pieces of coral, which they want to sell or keep as souvenirs. People have dropped sticks of dynamite（炸药）into the water to catch more fish. The worst problem is the heating up of the oceans. Higher ocean temperatures kill the important food source for the coral—the algae, the tiny greenish-gold water plants that live on coral. 　 5.　 The coral turns white and dies. Scientists call this coral bleaching（珊瑚白化）. The bleached part of the coral reef cannot recover.

A. They come in many different colors.

B. However, humans have taken less than 100 years to destroy it.

C. This has blown up parts of the reefs.

D. When the algae die, the coral loses both its food and its color.

E. So are all the sea plants and animals that depend on them.

F. Chemicals from the poisons kill reefs or make them weak.

G. Many of them might not even last that long!

高一英语信息匹配中等难度题查看答案及解析

People have used pigeons to carry messages to one another for hundreds of years. In fact, pigeons were a common way to send messages right up through Would War II.

In 1815, English troops were fighting Napoleon’s forces in France, and the English were believed to be losing. A financial panic swept over London. Government bonds（债券）were offered at low prices. Few people noticed that Nathan Rothschild, an English banker, was snapping up these bonds when everyone else was trying to sell them. A few days later, London learned the truth: the Duke of Wellington had defeated Napoleon at the battle of Waterloo. The value of the bonds soared（暴涨）, and Rothschild became wealthy…all because his pigeons had brought him news of the victory before anyone else knew of it.

Carrier pigeons were used by countries in both World War I and World War II. Not only were the birds often the fastest, most reliable way to send messages, they could also be used to reach soldiers far behind enemy lines, where radios and field telephone lines were useless. Since they could easily be released from airplanes or ships, every branch of the armed services used the birds.

Carrying messages could be a dangerous job. Some pigeons performed with such bravery that they became famous and were even awarded medals. The most famous pigeon of all may have been Cher Ami. Stationed in France during World War I, he carried twelve important messages for American forces. On his last mission, though wounded, he carried a message that saved the lives of 194 American soldiers. For his amazing service, he was awarded the French “Croix de Guerre.”

Today, modern communication methods can carry information from one place to another hundreds of times faster than a pigeon could do it. However, few people would argue with the fact that carrier pigeons — especially those that served in the military — have earned their place in history.

1.Nathan Rothschild made his fortune by ________.

A. relying on messages sent to him by carrier pigeons

B. predicting successfully the result of the battle

C. his experience and a good knowledge of bonds

D. his ability to tell right from wrong

2.What does “snapping up” mean in the second paragraph?

A. Giving away.

B. Destroying.

C. Throwing out.

D. Buying.

3.The author provides dates and numbers throughout this text in order to ________.

A. avoid mixing up the readers’ minds when reading for information

B. prove that carrier pigeons are more important in modern times than in the past

C. show the influence of carrier pigeons at important points in history

D. explain the causes and effects of world events

4.What is the author’s attitude towards carrier pigeons?

A. Doubtful.　　 B. Negative.

C. Positive.　　 D. Unconcerned.

高一英语阅读理解中等难度题查看答案及解析