. Four-fifths of the crop ______. A．are ruine...

.  Four-fifths of the crop ______.

高三英语单项填空简单题查看答案及解析

Bats quickly eat the insects that bite us and ruin our crops. They pollinate (授粉) flowers and they replant forests by spreading seeds around. But as agriculture overtakes rain forests and jungles, humans have come into conflict with one bat species: the common vampire bat (吸血蝙蝠).

Well, vampire bats are ugly little animals. They’ve got these wrinkly noses that have infrared (红外线的) heat sensors so they can detect warm blood flowing beneath the skin. They’ve got ears that can pick up the sound of low frequencies. That’s the sound of big animals breathing. And they have super sharp teeth. So when you’re bitten by one of these bats, you don’t even feel it. They also have amazing movement skills. They can fly, but they can also run with their wings,

And vampire bats mainly interact with humans who are raising livestock. They’ll drink the blood of cows and pigs and chickens. You can find newborn cows with bites from vampire bats, chicken coops that are covered in drips of blood. Children will regularly wake up with vampire bat bites on their feet. Actually, the bites aren’t that big of a health problem. The main problem is that very rarely these bats are sick with rabies (狂犬病). And they can spread this fatal disease to cattle and people.

Gerry, a scientist, does experiments where he keeps one of the bats away from food for a night. And that’s something that actually happens in the wild all the time. The bat will go out and it can’t find anything to eat. And if that happens two nights in a row, the bat could actually starve to death. But what happens is that another bat will come in and they’ll rescue that hungry bat. They’ll let out a little blood to feed it. And this behavior is seen between mothers and their children and between siblings. But surprisingly, it’s also seen between bats that aren’t related at all.

1.What does the second paragraph mainly want to tell us about vampire bats?

A.Their physical organs. B.Their super powers.

C.Their living habits. D.Their attacking skills.

2.What is the vampire bat’s biggest threat to human beings?

A.It drinks the blood of livestock. B.It prefers to bite little children.

C.It can spread a fatal disease. D.It is often infected with rabies.

3.What do Geny’s experiments find out?

A.Bats, not related by blood, share blood. B.Bats usually live a hard life in the wild.

C.Different bats live a quite different life. D.Blood is even more important for bats.

4.What can we can infer from the text?

A.Vampire bats are human’s natural enemy.

B.Human should try to get rid of vampire bats.

C.Vampire bats are human’s true friends.

D.Vampire bats should not always be blamed.

高三英语阅读理解中等难度题查看答案及解析

　Bananas are one of the world’s most important food crops. They are also one of the most valuable exports. Bananas do not grow from seeds. Instead, they grow from existing plants. Bananas are threatened by disease because all the plants on a farm are copies of each other. They all share the same genetic weaknesses. For example, the Cavendish banana is most popular in North American and European markets. However, some kinds of fungus organisms easily infect the Cavendish. Black Sigatoka disease affects the leaves of Cavendish banana plants. The disease is controlled on large farms by putting chemicals on the plants’ leaves. Farmers put anti-fungal chemicals on their crops up to once a week.

Another fungal disease is more serious. Panama disease attacks the roots of the banana plants. There is no chemical treatment for this disease. Infected plants must be destroyed. Panama disease has affected crops in Southeast Asia, Australia and South Africa. There is concern that it may spread to bananas grown in the Americas. This could threaten an important export product for Central and South America.

The International Network for the Improvement of Banana and Plantain supports research on bananas. The group has headquarters in France and other offices in the major banana-growing areas of the world. The group says that more research must be done to develop improved kinds of bananas. The group says that fungal diseases mainly affect only one kind of banana. In fact, there are five hundred different kinds of bananas. Food and Agriculture Organization of the United Nations has said that the Cavendish banana represents only 10% of world production.

The U. N. agency says farmers should grow different kinds of bananas. This protects against diseases that affect only one kind. Experts warn that disease may cause the Cavendish banana to disappear. This happened earlier to another popular banana because of its genetic weakness against disease.

1.What does this passage mainly tell us?

A. Bananas are the world’s most important food crops.

B. The risk to a popular banana shows need to grow other kinds.

C. There are five hundred different kinds of bananas.

D. How to grow bananas in different countries.

2.Bananas are threatened by disease because　　.

A. they grow from seeds

B. they are one of the most valuable exports

C. the only way to prevent it is to put chemicals on their leaves

D. they have genetic weaknesses against disease

3. Panama disease　　.

A. doesn’t belong to fungal disease

B. affects the leaves of banana plants

C. destroys bananas more seriously than Black Sigatoka disease

D. has spread to bananas all over the world

4. We can infer from Paragraph 3 that　　.

A. the center of the group is in the US

B. the Cavendish banana covers only a small part of the yield of bananas

C. the key to solving the disease is to research all kinds of bananas

D. each fungal disease affects five hundred different kinds of bananas

高三英语阅读理解中等难度题查看答案及解析

Bananas are one of the world’ s most important food crops. They are also one of the most valuable exports. Bananas do not grow from seeds. Instead, they grow from existing plants. Bananas are threatened by disease because all the plants on a farm are copies of each other. They all share the same genetic weaknesses. For example, the Cavendish banana is most popular in North American and European markets. However，some kinds of fungus organisms easily infect the Cavendish. Black Sigatoka disease affects the leaves of Cavendish banana plants. The disease is controlled on large farms by putting chemicals on the plant’ s leaves. Farmers put anti-fungal chemicals on their crops up to once a week.

Another fungal disease is more serious. Panama disease attacks the roots of the banana plant. There is no chemical treatment for this disease. Infected plants must be destroyed. Panama disease has affected crops in Southeast Asia, Australia and South Africa. There is concern that it may spread to bananas grown in the Americas. This could threaten an important export product for Central and South America.

The International Network for the Improvement of Banana and Plantain supports research on bananas. The group has headquarters in France and other offices in the major banana-growing areas of the world. The group says that more research must be done to develop improved kinds of bananas. The group says that fungal diseases mainly affect only one kind of banana. In fact, there are five hundred different kinds of bananas. Food and Agriculture Organization of the United Nations has said that the Cavendish banana represents only 10% of world production.

The U．N. agency says farmers should grow different kinds of bananas. This protects against diseases that affect only one kind. Experts warn that disease may cause the Cavendish banana to disappear. This happened earlier to another popular banana because of its genetic weakness against disease.

1.What does this passage mainly tell us?

A. Bananas are the world’ s most important food crops.

B. The risk to a popular banana shows need to grow other kinds.

C. There are five hundred different kinds of bananas.

D. How to grow bananas in different countries.

2.Bananas are threatened by disease because ________.

A. they grow from seeds

B. they are one of the most valuable exports

C. the only way to prevent it is to put chemicals on their leaves

D. they have genetic weaknesses against disease

3.Panama disease________.

A. doesn’t belong to fungal disease

B. affects the leaves of banana plants

C. destroys bananas more seriously than Black Sigatoka disease

D. has spread to bananas all over the world

4.We can infer from Paragraph 3 that ________.

A. the center of the group is in the US

B. the Cavendish banana covers only a small part of the yield of bananas

C. the key to solving the disease is to research all kinds of bananas

D. each fungal disease affects five hundred different kinds of bananas

5.According to the passage, which information is right?

A. The Cavendish banana can mainly be imported from North America and Europe.

B. Panama disease affects the leaves of Cavendish banana plants.

C. The Cavendish banana won’t die out in the future.

D. The Cavendish banana makes up only one tenth of world production.

高三英语阅读理解中等难度题查看答案及解析

It was one of the hottest days of the dry season. We had not seen rain in almost a month. The crops were 　　 . Every day, my husband and his brothers would go about the hard 　　 of　 trying to get water to the fields. If we didn’t see some rain soon, we would lose everything.

It was on this day that I learned the true lesson of sharing and 　　 a miracle﹙奇迹﹚. I was in the kitchen making lunch when I saw my six-year old son, Billy, walking toward the woods. He wasn’t walking as usual, but with a serious purpose. He was obviously walking with great effort, trying to be as 　　 as possible. Minutes after he disappeared into the 　　 , he came running out again, toward the house.

Moments later he was once again walking in those slow purposeful steps towards the woods. He kept doing this for about an hour. Finally I decided to 　　 him on his journey.

He was cupping﹙使成杯形﹚ both hands in front of him as he walked, being very 　　　 not to spill the water he held in them. Then I saw a tiny deer lying on the ground, 　　 suffering from dehydration（脱水）, lift its head with great effort to lap up(舔食) the water cupped in my boy's hands.

When the water was 　　 , Billy jumped up to ran back to the house. I was there in front of him. His eyes just filled with 　　 . "I'm not wasting water" was all he said and I hugged him tightly.

As the tears that 　　　 my face began to hit the ground, they were suddenly joined by other drops… more drops… and more. I looked up at the sky. It was raining!

Some will probably say that this was nothing but a huge 　　 . All I can say is that the rain that came that day saved our farm, just like the actions of one little boy saved another.

1.A. dying　　 B. growing　　 C. reducing　　 D. changing

2.A. situation　　　　 B. belief　　 C. conclusion　 D. process

3.A. attempted　　 B. inspected　　 C. witnessed　　 D. announced

4.A. patient　　 B. gentle　　 C. cheerful　　 D. steady

5.A. woods　　 B. corner　　 C. crowds　　 D. house

6.A. catch　　 B. follow　　 C. describe　　 D. ask

7.A. practical　　　　 B. funny　　 C. familiar　　 D. careful

8.A. gradually　　 B. naturally　　 C. obviously　　 D. suddenly

9.A. spilt　　　　　 B. gone　　 C. bad　　 D. cold

10.A. joy 　　 B. sympathy　　 C. tears　　 D. courage

11.A. rolled down　　　　 B. rolled off　　 C. rolled from　 D. rolled out

12.A. incident　　 B. coincidence　 C. possibility 　 D. matter

高三英语完形填空中等难度题查看答案及解析

It was one of the hottest days of the dry season. We had not seen rain in almost a month. The crops were dying. Cows had stopped giving milk. If we didn’t see some rain soon we would lose everything.

　I was in the kitchen making lunch for my husband and his brothers when I saw my six-year-old son, Billy, walking toward the woods. He was obviously walking with a great effort. Minutes after he disappeared into the woods, he came running out again, toward the house.

Moments later, however, he was once again walking toward the woods. This activity went on for over an hour: walking cautiously to the woods, then running back to the house. Finally, my curiosity got the best of me. I went out of the house and followed him on his journey.

　He was cupping both hands in front of him as he walked; being very careful not to spill the water he held in them. Branches and thorns (荆棘) slapped his little face but he did not try to avoid them. As I leaned in to spy on him, I saw the most amazing site.

　Several large deer appeared threatening in front of him. But Billy walked right up to them. I almost screamed for him to get away. And I saw a baby deer lying on the ground, obviously suffering from heavy loss of water, lift its head with great effort to drink the water cupped in my beautiful boy's hand.

　I stood on the edge of the woods watching the most beautiful heart working so hard to save a life. As my tears began to hit the ground, they were suddenly joined by other drops... and more drops... and more. I looked up at the sky. It was as if God, Himself, was weeping with pride.

1.Why did the author follow her son?

A. Because there might be danger.

B. Because her son was doing a good deed.

C. Because she was curious.

D. Because she intended to help.

2.Which of the following statements is Not True according to the passage?

A. Rain was in great need.

B. There were few trees in the woods.

C. Billy carried water with his small hands.

D. Billy walked into the woods and then returned over and over again.

3.What Billy did mainly showed that he was ________.

A. caring                            B. beautiful             C. childlike               D. brave

4.Which is the correct order of the development of the story?

① The author was moved to tears.

② Billy fed the water to the baby deer.

③ Billy walked towards the large deer.

④ It began to rain.

⑤ The author followed Billy into the woods.

A. ③②⑤①④                     B. ④①③②⑤  C. ⑤③②①④            D. ⑤②①③④

高三英语阅读理解中等难度题查看答案及解析

In order to repay the money they borrowed, 60 % of the farmers _____cash crops.

高三英语单项填空中等难度题查看答案及解析

Scientists are working to develop crop plants that can reduce the amount of water used for agriculture. Almost sixty percent of the world’s freshwater withdrawals from rivers, lakes and other water resources go toward irrigating fields.

Scientists are using biotechnology as well as traditional breeding methods to develop water-saving crops to feed a growing world.

Thomas “Tommy” Carter is a plant scientist in North Carolina. He works for the Agricultural Research Service in the United States Department of Agriculture. He leads Team Drought, a group of researchers at five universities. They have been using conventional breeding methods to develop and test soybeans that can grow well under dry conditions.

Tommy Carter started working on drought-resistant soybeans in 1981. His research has taken him as far as China, where soybeans have been grown for thousands of years.

Farmers in the United States, however, have grown soybeans for only about a century. Tommy Carter says the soybeans they grow are for the most part genetically similar. More differences could better protect crops against climate changes that can reduce production. Those changes include water shortages which could increase from global warming.

The Agriculture Department has a soybean germplasm(胚质) collection, a collection of genetic material passed from one generation to the next. Members of Team Drought studied more than 2,500 examples from the collection.

They looked at ones from the home of soybeans, Asia. They searched for germplasms that could keep plants from weakening and wilting (凋谢)during hot, dry summers in the United States.

Tommy Carter says they found only five. But these slow-wilting lines, he says, produce four to eight bushels（英斗）more than normal soybeans under drought conditions. The yield depends on location and environment.

Scientists are also working on other plants that either use less water or use it better, or both. For example, companies like Monsanto, DuPont and Syngenta have been developing corn with reduced water needs. Monsanto expects to be ready in a few years to market its first corn seeds genetically engineered to resist drought.

1.According to the passage, scientists try to find out how to _______.

A. grow crops with less water

B. increase crop production

C. feed a growing world

D. save the world’s water resource

2.Why did Tommy Carter come to China?

A. He likes traveling.

B. China has a long history.

C. He’s doing research into soybeans.

D. He works for the Agricultural Research Service.

3.What’s inferred from the passage?

A. Climate changes lead to global warming.

B. Water shortages contribute to global warming.

C. Genetically different soybeans need much water to grow.

D. Genetically different soybeans help to fight against damaging climate changes.

4.What do we know about slow-wilting plants talked about in the passage?

A. They yield big profits.

B. They can grow in almost any climate.

C. They seem to be drought-resistant.

D. They need much water for their growth.

高三英语阅读理解中等难度题查看答案及解析

The sight of the ruined temple ______ him of the time when he was trapped but_____ to escape from it through a narrow opening in the quake.

高三英语单项填空中等难度题查看答案及解析

Baths have long been considered of medical importance to man. In Greece there are the ruins of a water system for baths built over 3,000 years ago. The Romans had warm public baths. In some baths, as many 3,000 persons could bathe at the same time.

Treating disease by taking bathing has been popular for centuries. Modern medical bathing first became popular in Europe and by the late 1700’s has also become popular in the United States.

For many years frequent bathing was believed to be bad for one’s health. Ordinary bathing just to keep clean was avoided, and perfume was often used to cover up body smells!

By the 1700’s doctors began to say that soap and water were good for health. They believed that it was good for people to be clean. Slowly, people began to bathe more frequently. During the Victorian Age of the late 19th century, taking a bath on Saturday night became comon.

In the United States ordinary bathing was slow to become popular. During the 18th and early 19th centuries, many Americans were known as “The Great Unwashed!” In one American city , for example, a person was only allowed to take a bath every thirty days! That was a law!

Frequency of bathing today is partly a matter of habit. People know that bathing for cleanliness is important to health, Doctors know that dirty bodies increase the chance of diseases. As a result, in the United States, people generally bathe often. Some people bathe once a day at least. They consider a daily bath essential to good health.

1.A water system for baths was built by _______ over 3,000 years ago.

A. the Romans                     B. the Greeks

C. the Americans                   D. the Europeans

2.Dirty bodies can ______ .

A. ruin one’s business              B. cause disease

C. drive customers away            D. cause good health

3.In the 18th century doctors believed that being clean was     .

A. unimportant     B. good for health     C. harmful    D. important

4.The underlined word perfume probably means     .

A. a sweet smelling substance               B. good health

C. a strange smelling substance              D. large wealth

5.Which of the following gives the main idea of the passage?

A. Everybody in America takes a daily bath.

B. We should often take baths

C. Taking baths has become popular in the world.

D. Bathing has become easier and cheaper.

高三英语阅读理解中等难度题查看答案及解析