Millions of years ago dinosaurs (恐龙) lived on...

Millions of years ago dinosaurs (恐龙) lived on the earth. In the days of dinosaurs the whole earth was warm and wet. There were green forests and they could find enough to eat. Later, parts of the earth became cold and dry. and the forests there died. Then dinosaurs could not find enough to eat. This must be one reason why dinosaurs died out.

We can guess another reason. New kinds of animals came on the earth. Some had big brains and were fast and strong. They could kill dinosaurs. There may be other reasons that we don’t know about yet. Scientists are trying to make more discoveries about dinosaurs.

Dinosaurs were of many sizes and shapes (形状).  Some were as small as chickens, while some were about 90 feet long.

There were also terrible fights between dinosaurs. They might have happened more than 100 million years ago. Though there was no man to see any of the fights, we can be told by the animal’s footprints (足迹) that fight did take place.

1.According to the passage, dinosaurs did exist only ______on the earth.

2.One reason why dinosaurs died out is that______.

3.One more reason may be that ______.

4.We can see from this passage ______.

高三英语阅读理解中等难度题查看答案及解析

Sixty-five million years ago, an asteroid (小行星) that crashed on Earth led to the disappearance of the largest animals that have ever walked our planet – the dinosaurs. At least, this is what some scientists believe. But that accident happened so long ago. People have come to believe that we are free of threats from asteroids and everything else from space.

However, what happened on Feb 15 , 2013 was a reminder that we’re just as vulnerable as the dinosaurs once were. Two objects from space – a meteor (陨石) and an asteroid called 2012 DA14 –  visited Earth’s atmosphere on the same day. The former fell in Russia, injuring 1,200 people, while the latter passed by Earth at a record-setting close distance.

Scientists had been expecting the asteroid since last year, but the meteor was a surprise. NASA’s telescope system only detects asteroids at least 50 meters in diameter (直径), which is just about the size of 2012 DA14. But the meteor was much smaller, which made it harder to spot.

But what if we do spot an asteroid that is headed right for Earth? There are several possible ways in which dangerous asteroids could be made to change its orbit. Which method is best depends on several factors and most importantly  –  how much time we have to stop it.

If there is enough time before the hit, we can send off a heavy spacecraft to travel alongside the asteroid. The gravity from the spacecraft would gradually change the rock’s orbit. Besides that, scientists could one day use sun-powered lasers to either make asteroids disappear or change their course. If there’s not enough time, we’ll have to go after the asteroid with a spacecraft and change its orbit with a crash. Finally, if things are truly desperate, there will be only one choice left –  to use a nuclear bomb. That could turn the asteroid into a meteor shower, which would be even more dangerous.

1.The author mentioned the asteroid that led to the dinosaurs’ dying out to ______.

A. show that asteroids fall from space frequently

B. alert people about the possible danger of objects falling from space

C. inform readers about the constant threats the Earth faces

D. suggest that there are still many mysteries about the universe

2.The underlined word “vulnerable” in the second paragraph probably means ______.

A. unprotected                  B. lonely            C. stupid            D. self-important

3.Which of the following statements is TRUE about the meteor that fell to the Earth in Russia?

A. It passed by the Earth at a close distance.

B. It was spotted by NASA’s telescope system a year ago.

C. It is about the same size as the asteroid that passed by the Earth.

D. It fell to the Earth and caused great damage to the local community.

4.What is the main idea of the article?

A. Learning about asteroids and meteors.

B. The threats of objects from space and possible solutions.

C. NASA’s latest technology to discover visitors to the Earth from space.

D. How to measure the damage of collisions from asteroids and meteors.

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Man has been on the earth about one million years. He_1.　　 (manage) to live on every part of the planet, even though some climates have made life difficult. It is thought 2. (different) in skin color are the result of climatic__3.　 .(adapt). For example, people with skin colors of yellow, red, and olive, generally come from areas 4._ they have had to adapt to other climates. Man's size also seems to　　 5. (various) according to climate. People living in colder regions are generally larger than6._ living in hotter ones. This difference might be explained_7. the fact that big people have less skin compared to weight than do small people. The less skin a person has relative to his weight, the easier　 8. 　 is for him to keep warm. As part of the natural environment, climate greatly affects human activities. Climate has a significant　 9.　 　 0n agriculture. Climatic factors restrict the kinds of crops that can be grown. Man changes his living habits in order to adjust to climate, but climate 10.　　 (change) as well, though more slowly. By learning more about his climate, man will find a way to adapt to or control it and live a more comfortable life.

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Sharks have lived in the world's oceans for millions of years. A shark has an extremely good sense of smell. It can find small amounts of substances in the water, such as blood, body liquids and chemicals produced by animals. These powerful senses help them find their food. ________1.________

Sharks grow slowly. About forty percent of the different kinds of sharks lay eggs. ________2.________ Some sharks carry their young inside their bodies as humans do. Some sharks are not able to reproduce until they are twenty years old. Most reproduce only every two years. And they give birth to fewer than ten young sharks. For this reason, over-fishing of sharks is of special danger to the future of the animal.

________3.________.They eat injured and diseased fish. Their hunting activities mean that the numbers of other fish in the ocean do not become too great. This protects the plants and other forms of life that exist in the oceans.

People hunt sharks for sport, food, medicine and their skin. Experts say the international market for some kinds of sharks has increased greatly because many parts of a shark are valuable. 4. . Shark liver oil is a popular source of Vitamin. The skin of a shark can be used like leather. In Asia, people enjoy a kind of soup made from shark fins. Experts say a fisherman can earn a lot of money for even one kilogram of shark fins.

Sharks are among the oldest animals on Earth. ________5.________ If too many sharks in one area are killed, the group of shark may never return to normal population levels

A. The others give birth to live young.

B. Sharks are important for the health of the world's oceans.

C. This is a threat to other form of life in the ocean.

D. Collectors pay thousands of dollars for the jaws of a shark.

E. Sharks are valuable to us and we can make full use of them.

F. But some sharks are in danger of disappearing from Earth.

G. Sharks eat fish, other sharks, and plants that live in the ocean

高三英语其他题中等难度题查看答案及解析

The disappearance of dinosaurs made _______ the evolution and dominance of mammals on the earth.

A. it was possible  B. it possible          C. possible to be       D. possible

高三英语单项填空中等难度题查看答案及解析

Plants on Earth have grown for hundreds of millions of years, yet President Donald Trump’s pick to lead his new climate team insists that they need more carbon dioxide (CO2) to boom.

Princeton physicist and carbon dioxide-advocate William Happer has been selected to head the brand new Presidential Committee on Climate Security. The atomic scientist, who achieved recognition for his work on atomic collisions (原子碰撞), not climate science, declared that the planet’s atmosphere needs significantly more CO2, which is reported to speed up climate change. Happer said plants use CO2 to live and more CO2 is actually a benefit to the Earth. He also stressed that Earth is experiencing a “CO2 starvation”, and concludes that “If plants could vote, they would vote for coal.”

Earth and plant scientists, however, find Happer’s insistence that the plant kingdom would benefit from increased CO2 wrong-headed and it lacks evidence. For example, Earth’s CO2 levels have increased sharply in the last century, and are now at their highest levels in at least 800,000 years—though other measurements show CO2 levels are higher than they’ve been in 15 million years. “The idea that increased CO2 is universally beneficial ‘to plants’ is very misguided,” Jill Anderson, an evolutionary ecologist specializing in plant populations, said in an interview. Data shows the evolution of global average temperature and CO2 concentration from 1850 to 2019. Though 2019 is a bit cooler than recent years, it still is one of the warmest years ever and lies close to the trend line of global warming.

Both independent academic organizations and government agencies around different parts of the world concluded more CO2 will bring many negative impacts to plant environments. And they added that “If someone is going to claim it is good, it’s necessary for them to show evidence.”

1.Why does Happer think plants need more CO2?

A. Plants vote for more CO2. B. CO2 speeds up climate change.

C. Plants need more CO2 to live. D. CO2 is actually a benefit to the Earth.

2.What can be inferred from paragraph 3?

A. 2019 is a bit warmer than recent years.

B. CO2 levels must be the highest in history.

C. The plant kingdom must benefit from increased CO2.

D. There are adequate evidence to support Happer’s insistence.

3.What does the underlined word “it” in the last paragraph probably refer to?

A. More CO2. B. The plant.

C. The world. D. The US government.

4.The author’s attitude in writing this passage can be described as ________.

A. critical B. objective

C. positive D. negative

高三英语阅读理解中等难度题查看答案及解析

Some 30,000years ago, artists who lived in caves in Europe painted pictures of the animals around them: panthers, hyenas, rhinos, cave lions, mammoths and other creatures which have been extinct for a long time. The paintings were highly realistic. Some even showed movement.

The artwork, more than a thousand drawings, is considered the oldest group of human cave drawings which have ever been discovered. They were preserved because the cave was sealed--closed off--for more or less 23,000 years.

Fast forward to December 18, 1994, a group of French cave scientists were exploring caves in southern France. Jean-Marie Chauvet, who led the group then, describes the process of discovering the cave paintings.”At that time I was in the front, Eliette just walked behind me, Christian behind. Eliette said she saw two marks made with red ochre and she said, ‘They came here.’And at this very moment everything began. The drawings and everything linked to the parietal art (壁画). That is where it started.”

Cave art expert Jean Clottes reviewed the paintings. “I was amazed at the number of paintings there were and paintings of their quality and particularly in front of the panel of the horses.”

Scientific analysis confirmed the prehistoric date of the artwork. Studies showed the drawings were created tens of thousands of years ago, before human history was written. The United Nations’cultural agency UNESCO lists the cave as a World Heritage Site. They say that the drawings form a remarkable expression of early human artistic creation of grand excellence and variety.

The Chauvet Cave has been named after the explorer who first entered it. However, its environment and drawings are too fragile to be visited by human beings. So the cave is closed, and only people there for scientific purposes can go inside and see the artwork.

However, French authorities asked experts to create an exact copy of the cave, called Pont d’Arc Cavern. The copy, which we also call replica, cost more than 59million dollars to build. It opened at the end of April in France.

Pascal Terrasse is the president of the cavern. He says everyone will be able to experience the thrill of looking at drawings made by the first humans in Europe. He says the place is magic because it is done so well. Authorities say they think as many as 400,000people will be allowed to visit Pont d’Arc Cavern every year.

1.According to the passage, the first scientist to enter the cave was ________.

A.Christian B.Eliette

C.Clottes D.Chauvet

2.According to Jean Clottes’ words in Paragraph 4, the paintings in the cave were ________.

A.abstract B.superior

C.creative D.inspiring

3.Which of the following statements is TRUE about the Chauvet Cave?

A.It was closed off for more than 30, 000years.

B.It is thought to be the origin of modern parietal art.

C.The environment and artwork there are very easy to damage.

D.The majority of drawings there are about the extinct animals.

4.The purpose of creating Pont d’Arc Cavern is to ________.

A.show admiration for the earliest artists in Europe

B.arouse visitors’awareness of protecting ancient art

C.offer visitors chances to view the wonderful artwork

D.collect money for the perseverance of the Chauvet Cave.

高三英语阅读理解中等难度题查看答案及解析

In the suburban district of a city lived an old woman quite alone. Her husband died thirty years ago and two years later, her only son went away with lung cancer. So she had no family still living and her only friend was a little white dog who went everywhere with her - with one exception. The dog loved the fireplace in winter, and after the old woman went to bed he would sometimes go and lie in front of the warm coals. Usually though, the dog lay on a rug right next to the bed.

Deeply as the old woman loved her dog, she wouldn't allow the dog on the bed with her. However, if she became frightened or had a nightmare, she would put her hand down to her little white dog and he would lick it to calm her down.

One night she was reading the newspaper just before going to sleep. She trembled and pulled the duvet（羽绒被褥）up around her as she read that a mental patient had wandered out from a nearby hospital. No one knew if the patient was dangerous or not, but he was a suspect in the murders of several women who lived alone.

The woman turned off the lights and tried to sleep, but she was frightened, and turned over continually. Finally, she reached down to where her little white dog slept. Sure enough, a warm, wet tongue began to lick her hand. The woman felt reassured and safe, and left her hand hanging off the side of the bed. As she turned to settle in comfortably she opened her eyes for a moment and looked through the open door into the living room.

There in front of the fireplace, sat her little white dog, gazing at the coals and wagging his tail. And down beside her bed, something was still licking her hand.

1.From the first paragraph we can know that _________.

2.Why didn’t she allow the dog on the bed with her?

3.The reason the old woman shivered was that _____________.

4.Seeing the dog still sitting by the fireplace, __________.

高三英语阅读理解中等难度题查看答案及解析

Sharks have lived in the oceans for over 450 million years, long before dinosaurs appeared. There are now about 360 　　　　　　 of sharks, whose size, behavior, and other characteristics differ widely.

Every year, we catch and kill over 100 million sharks, 　　　　　　 for food and for their fins. Dried shark fins are used to make shark fin soup, which sells for as much as $50 a bowl in fine Hong Kong 　　　　　　 . Other sharks are killed for sport and out of fear. Sharks are vulnerable(脆弱的) to overfishing because it 　　　　 most species 10 to 15 years to begin reproducing and they produce only a few offspring.

　　 　　 by movies and popular novels, most people see sharks as people-eating monsters. This is far from the 　　　　　 . Every year, a few types of shark injure about 100 people worldwide and kill about 25. Most 　　　　　 are by great white sharks, which often feed on sea lions and other marine mammals. They sometimes mistake human swimmers for their normal prey, 　　　　　 if they are wearing black wet suits.

If you are a typical ocean-goer, your 　　　　 of being killed by an unprovoked （无缘无故的）attack by a shark are about 1 in 100 million. You are more　 　　　　　　 to be killed by a pig than a shark and thousands of times more likely to get killed when you drive a car.

Sharks help 　　　　　 human lives. In addition to providing people with food, they are helping us learn how to 　　　　　 cancer, bacteria, and viruses. Sharks are very healthy and have aging processes similar to ours. Their highly effective immune system 　　　　　 wounds to heal quickly without becoming infected, and their blood is being studied in connection with AIDS research.

Sharks are among the few animals in the world that almost 　　　　 get cancer and eye cataracts. Understanding why can help us improve human 　　 　 　　 . Chemicals extracted from shark cartilage have killed cancerous tumors in laboratory animals.

1.A. species　 　　　 B. classes 　　 　 C. groups　 　 D. names

2.A. greatly　　 　　 B. popularly　 　 C. widely　 　 D. mostly

3.A. supermarkets　 B. restaurants　 C. offices D. companies

4.A. spends　 　　　 B. takes　　 　　　 C. costs　 　　 D. uses

5.A. Impressed　 　　 B. Moved　 　　　　 C. Changed D. Influenced

6.A. story 　　　 　　 B. truth　　 　　　 C. movie　　 　 D. problem

7.A. injuries　 　　 B. deaths　 　　 C. attacks　　 D. causes

8.A. specially 　　 B. especially　 C. mainly　　 D. usually

9.A. chances 　　　 B. fears　 　　　 C. lives　　 　 D. percentages

10.A. likely 　　　 B. frequent　 　　 C. possible　 D. lucky

11.A. avoid　 　　　　 B. save　 　　　　 C. keep　　 　　 D. prevent

12.A. damage 　　　 B. destroy 　　 C. fight　 　 D. ruin

13.A. advises　 　　 B. allows　　 　　 C. forces 　 D. forbids

14.A. never　 　　　　 B. seldom　 　　　 C. often　 　 D. usually

15.A. analysis 　　 B. research 　　 C. study　　 　 D. health

高三英语完形填空简单题查看答案及解析

Twenty years ago, I drove a taxi for a living. One time I arrived in the middle of the night for a pickup at a building that was ________ except for a single light in a ground floor window. I walked to the door and knocked.

A small woman in her 80’s opened the door. I took her suitcase to the cab then returned to ________ her into the cab. She thanked me for my kindness. When we got in the taxi, she gave me a(n)  , then asked, “Could you drive through downtown ?”

“It’s not the ________ way,” I answered.

“Oh, I don’t mind,” she said. “I’m in no hurry. I’m on my way to a hospice (临终关怀医院).”

I looked in the rear view mirror. Her eyes were glistening.

“The doctor says I don’t have very long.”

I quietly reached over and ________ the meter (计程器). “What ________ would you like me to take?” I asked.

For the next two hours, we drove through the city. She showed me the building where she had once worked as an elevator operator. We drove through the neighborhood where she and her husband had lived. Sometimes she’d ask me to ________ in front of a particular building or corner and would sit staring into the darkness, saying nothing.

As the sun was ________, she suddenly said: “I’m tired. Let’s go now.”

We drove in ________ to the address she had given me. There were people waiting for her and they put her in a wheelchair.

“How much do I have to pay you?” she asked, reaching into her purse.

“Nothing,” I said.

Almost without thinking, I bent and gave her a hug. She held onto me tightly.

“You gave an old woman a little moment of ________,” she said.

I squeezed her hand, then walked into the dim morning light. Behind me, a door shut.

I didn’t ________ any more passengers that shift. I drove aimlessly, lost in thought. We tend to think that our lives revolve around great moments. But great moments often 47 us unconsciously.

1.A. ancient                   B. dark                            C. dirty                    D. remote

2.A. invite                      B. watch                      C. help                        D. receive

3.A. address                  B. letter                      C. speech                   D. present

4.A. wrong                     B. funniest                      C. safest                  D. shortest

5.A. cut out                    B. showed off            C. switched off          D. turned on

6.A. direction            B. order                              C. role                         D. route

7.A. break down           B. get off                              C. speed up               D. slow down

8.A. changing            B. moving                           C. rising                 D. Setting

9.A. darkness                B. noise                       C. silence                   D. sadness

10.A. joy                     B. interest                          C. trouble                   D. surprise

11.A. talk with           B. call up                             C. pick up                   D. take away

12.A. catch                    B. drive                  C. improve                  D. puzzle

高三英语完型填空中等难度题查看答案及解析