An extinct mountain goat that was once common in the Pyrenees became the first animal to be brought back from extinction. Researchers used frozen DNA to produce a clone, but the newborn kid died within minutes of birth due to breathing difficulties.
The Pyrenean ibex is a type of mountain goat，which is believed to have died out completely in 2000. Before the death of the last known individual（a13-year-old female known as Celia）, biologists took cells from her skin and ears. An earlier cloning attempt to use the skin cells failed. But the latest attempt involved the creation of 439 cloned embryos. Of these cloned embryos, 57 were put into the female domestic goats, but only one goat gave birth and the newborn cloned kid died after seven minutes as a result of lung disease.
Researchers say that other cloned animals, including sheep, have been born with similar lung disease, but they say that overall the experiment was a major step forward in the effort to bring the ibex back to its mountain home. The leading researcher Jose Folch says, “the cloned kid was genetically like the ibex；in species such as the ibex，cloning is the only possibility to avoid its complete disappearance.”
The failure to produce a living clone from DNA that was frozen only a decade ago shows the difficulty researchers would face in trying to bring back species that have been extinct（灭绝的） for decades or centuries. Researchers have had the idea of bringing back the Tasmanian tiger, which went extinct in 1936. There are, however, other species that have been seriously suggested for cloning，such as the giant panda, the African bongo antelope, the Sumatran tiger and the pygmy hippo. Supporters believe cloning provides hope of keeping these endangered animals alive before they die out．
1.What do we know about the cloned ibex?
A. It died of lung disease.
B. It was the first cloned animal in the world.
C. It lived for thirteen years.
D. It was born in 2000.
2.Jose Foleh would agree that cloning ．
A. is not suitable and should be banned.
B. requires immediate attention.
C. should be carried out cautiously.
D. may help prevent animal extinction.
3.We can conclude from the passage that ．
A. cloning has developed quickly in developed countries.
B. no more animals will die out in the future.
C. cloning makes it possible to preserve endangered species.
D. cloning seldom results in physical problems for animals.
4.What’s the best title for this passage?
A、Great advancement in cloning goats.
B、Difficulties in saving extinct animals.
C、Public concerns about cloning.
D、Cloning brought back an extinct species for a while.
高二英语阅读理解困难题
An extinct mountain goat that was once common in the Pyrenees became the first animal to be brought back from extinction. Researchers used frozen DNA to produce a clone, but the newborn kid died within minutes of birth due to breathing difficulties.
The Pyrenean ibex is a type of mountain goat，which is believed to have died out completely in 2000. Before the death of the last known individual（a13-year-old female known as Celia）, biologists took cells from her skin and ears. An earlier cloning attempt to use the skin cells failed. But the latest attempt involved the creation of 439 cloned embryos. Of these cloned embryos, 57 were put into the female domestic goats, but only one goat gave birth and the newborn cloned kid died after seven minutes as a result of lung disease.
Researchers say that other cloned animals, including sheep, have been born with similar lung disease, but they say that overall the experiment was a major step forward in the effort to bring the ibex back to its mountain home. The leading researcher Jose Folch says, “the cloned kid was genetically like the ibex；in species such as the ibex，cloning is the only possibility to avoid its complete disappearance.”
The failure to produce a living clone from DNA that was frozen only a decade ago shows the difficulty researchers would face in trying to bring back species that have been extinct（灭绝的） for decades or centuries. Researchers have had the idea of bringing back the Tasmanian tiger, which went extinct in 1936. There are, however, other species that have been seriously suggested for cloning，such as the giant panda, the African bongo antelope, the Sumatran tiger and the pygmy hippo. Supporters believe cloning provides hope of keeping these endangered animals alive before they die out．
1.What do we know about the cloned ibex?
A. It died of lung disease.
B. It was the first cloned animal in the world.
C. It lived for thirteen years.
D. It was born in 2000.
2.Jose Foleh would agree that cloning ．
A. is not suitable and should be banned.
B. requires immediate attention.
C. should be carried out cautiously.
D. may help prevent animal extinction.
3.We can conclude from the passage that ．
A. cloning has developed quickly in developed countries.
B. no more animals will die out in the future.
C. cloning makes it possible to preserve endangered species.
D. cloning seldom results in physical problems for animals.
4.What’s the best title for this passage?
A、Great advancement in cloning goats.
B、Difficulties in saving extinct animals.
C、Public concerns about cloning.
D、Cloning brought back an extinct species for a while.
高二英语阅读理解困难题查看答案及解析
Sacagawea was born in 1788 in an area near the Rocky Mountains that is now part of Idaho. She was part of the Shoshone tribe where her father was the chief.
When Sacagawea was 12, her tribe (部落) was attacked by the Hidatsa tribe. Sacagawea was taken to North Dakota to live with the Hidatsa. A few years later, she was sold into slavery and forced to marry Toussaint Charbonneau, a French Canadian fur trapper.
In 1804, Captains Meriwether Lewis and William Clark arrived in the area looking for guides. They were sent by President Thomas Jefferson to explore the Louisiana Purchase and the lands to the west.
Lewis and Clark hired Toussaint Charbonneau and asked him to bring along Sacagawea so she could interpret when they reached the Shoshone tribe.
Sacagawea was able to help out with much more than interpreting. She showed the men how to collect edible roots and other plants. She also helped to save important supplies and maps when her boat capsized (翻) in the river during a squall. The men were impressed with her quick action and named the river after her.
The journey across the western lands wasn’t easy. Everyone was often hungry and cold. It was especially hard for Sacagawea who had her infant son to carry and feed.
Clark wrote in his journal that Sacagawea was one of the most valuable members of the group. She spoke both Shoshone and Hidatsa and was able to keep things peaceful when the group met up with the Native Americans.
Sacagawea was the only woman on the expedition. Unlike the men, Sacajawea did not receive any payment for her part in the journey, despite her important role in helping the group return safely.
Not much is known of Sacajawea’s life after the expedition ended in 1806. Some think that she died a few years later and others say that she returned home to the Shoshone and lived for another seventy years.
1.The underlined word “interpret” in paragraph 4 has the closest meaning to the one in sentence ________?
A.He interpreted the role with a lot of humor, gaining a lot of applause.
B.The students were asked to interpret the poem.
C.The data can be interpreted in many different ways.
D.She couldn’t speak much English so her children had to interpret for her.
2.Sacagawea experienced the following things EXCEPT ________.
A.She was sold into slavery and forced to marry a fur trapper
B.She was sent by President Thomas Jefferson to explore the Louisiana Purchase
C.She had to feed her infant son during the expedition
D.She played an important part in helping the men return safely
3.What kind of person do you think of Sacagawea according to the passage?
A.Learned and flexible. B.Stubborn and determined.
C.Generous and responsible. D.Rebellious and powerful.
高二英语阅读理解中等难度题查看答案及解析
There once was a goat and a donkey(驴), which lived __1.___ a farm. The donkey worked the hardest so the farmer fed it the ____2.__ (much) food. Sometimes the donkey was given more food___3.___it could eat. This made the goat so jealous ___4.___ it began plotting against（谋划对付）the donkey. "Hey, donkey," the goat said one day. "I think you do too much work on this farm. You carry such heavy things from morning to night. Why don't you pretend ___5.____ (get) sick so you can take a day ___6.____?'' The donkey thought the goat had a great idea. So the next morning, the donkey lay in the stable（畜栏） on its side with its eyes ____7.___(close). Right away, the farmer called the doctor. _8._____looking at the donkey, the doctor said it needed a special medicine ___9.____（make）from the heart of a goat. So the farmer killed ___10.____goat and gave the donkey medicine made from its heart.
高二英语语法填空中等难度题查看答案及解析
For many years it was common in the United States to associate Chinese Americans with restaurants and places that wash clothes. People did not realize that the Chinese had been driven into these occupations by the prejudice and discrimination that faced them in this country.
The first Chinese to reach the United States came during the California Gold Rush of 1849. Like most of the other people there，they had come to search for gold. In that largely unoccupied land， the men staked a claim (立界标表明所有权) for themselves by placing makers’ in the ground. However，either because the Chinese were so different from the others or because they worked so patiently that they sometimes succeeded in getting a mining claim to make a profit ( where others saw no way to do so) ,they became the target".Of their competitors. They were troubled and attacked in many ways. Often they were prevented from working their claims; some places even passed regulations forbidding them to own claims. The Chinese therefore started to seek out other ways of earning a living. Some of them began to wash clothes for the white miners; others set up small restaurants. (There were almost no women in California in those days and the Chinese filled a real need by doing this" women's work". ) Some went to work as farmhands or as fishermen.
In the early 1860's many more Chinese arrived in California. This time railroad companies brought the men in to build the first railroad line from California to the East. They were sorely needed because the work was so hard and dangerous，and it was carried on in such an isolated part of the country that the railroad company could not find other laborers for the job. As in the case of the first Chinese in America， these Chinese were almost all males; and like them，too，they encountered a great deal of prejudice. The hostility grew especially strong after the railroad project was completed，and the Chinese laborers returned to California—thousands of them，all out of work
Many of today's Chinese Americans are the descendants of some of the early miners and railroad workers.
1. What is the main idea of the passage?
A. The first Chinese to reach the United States came during the California Gold Rush of 1849.
B. Many more Chinese arrived in California to construct the first railroad from California to the East.
C. Early Chinese immigrants to America experienced a lot of prejudice and discrimination.
D. Prejudice and discrimination that Chinese Americans met.
2. Why did the Chinese become the target of their competitors?
A. Because the Chinese were different and they worked patiently to achieve a lot of success while others couldn't.
B. The Chinese were so different from the others.
C. They worked so patiently with little payment
D. There were almost no women in California in those days.
3.What was the fate of the Chinese after the construction of the railroad?
A. They went back to their own country
B. They stayed to work in the railroad companies.
C. They went to California to search for gold.
D. The hostility grew especially strong.
4.What is the meaning of the word" encountered"?
A. face. B. Count. C. Enter. D. Handle.
5.The following statements are true EXCEPT .
A. during the California Gold Rush of 1849，people staked a claim for themselves by placing markers in the ground
B. the first Chinese went to America because they wanted to work as farmhands or as fishermen
C. many of today's Chinese Americans are the descendants of the early miners and railroad workers
D. the Chinese were sorely needed because the work was so dangerous
高二英语阅读理解中等难度题查看答案及解析
It was only in the eighteenth century that people Europe began to think mountains were beautiful .___36___ that time, mountains were ___37__ by the people living on the plains,__38___ by the city people, to whom they were wild and ___39___ places in which one was easily ___40___ or killed by terrible animals.
Slowly ,however , many of the people who were living ___41__ in the towns began to grow tired of ___42___. They began to feel interested in looking for things that could not be explained , for sights and sounds which produce a feeling of fear and excitement .___43___in the __44___century, people began to turn away from the man-made __45___ to the untouched country, and particulary ___46___a place where it was dangerous and wild. High mountains began to be __47__ for a holiday.
Then , mountain-climbing began to grow popular as a sport. To some people ,there is something greatly __48__about getting to the _49___ of a hight mountain . Struggling against nature is finer than a battle __50____ other human beings. And then, when you are at the mountain top after a long and difficult__51__, what a _52____ reward it is to be able to look _53___on everything within__54___! At such time, you feel happier and prouder than you can ever feel down__55____.
1. A．After B．In C．At D．Before
2. A．hated B．liked C．feared D．observed
3. A．however B．further C．sometimes D．especially
4. A．exciting B．interesting C．dangerous D．alone
5. A．fallen down B．lost C．discovered D．caught
6. A．unhappily B．lonely C．comfortable D．easily
7. A．them B．it C．themselves D．that
8. A．Yet B．So C．However D．But
9. A．last B．recent C．eighteenth D．early
10. A．country B．houses C．town D．planet
11. A．to B．at C．in D．for
12. A．important B．right C．necessary D．popular
13. A．pleasant B．interested C．dangerous D．terrible
14. A．foot B．spot C．top D．tip
15. A．with B．to C．against D．between
16. A．fight B．climb C．walk D．running
17. A．surprising B．satisfactory C．disappointing D．worrying
18. A．behind B．up C．down D．around
19. A．miles B．minutes C．seeing D．sight
20. A．above B．below C．under D．away
高二英语完型填空中等难度题查看答案及解析
Johnny lived with his mother and father in a small town in the mountains. One day there was an earthquake near the _______. Many houses were _______. Everyone thought that there would soon be another earthquake.
They were _______ that the second earthquake would be worse than the first. “We _______ send Johnny to a safe place,” Johnny’s mother said to her husband, “Many of our friends are sending _______ children to relatives in other towns.”
“We’ll _______ him to my brother, Peter,” Johnny’s father said. “He lives a long way away. Johnny will be _______ with him.”
He telephoned Johnny’s uncle Peter and asked him _______ he would let Johnny _______ with him.
“He is a good boy,” he said. “He won’t give you any ________.”
“________, Johnny’s uncle Peter said. ________ I’m not ________ to children. I ________ a very quiet and peaceful ________.”
“You won’t know Johnny is in the house.” His father told him.
________ Johnny, ________ was five, went to live with his uncle.
Two days ________, his mother and father ________ a telegram from Peter.
It said, “I’m returning the child. Please send the ________.”
1.A. village B. city C. town D. mountain
2.A. built B. broke into C. stayed up D. destroyed
3.A. worried B. fearless C. happy D. glad
4.A. must B. may C. can D. need
5.A. our B. your C. their D. my
6.A. bring B. take C. fetch D. send
7.A. happy B. safe C. satisfied D. angry
8.A. that B. how C. if D. when
9.A. live B. work C. study D. play
10.A. money B. free time C. happiness D. trouble
11.A. That’s all right B. All right C. Right D. Of course not
12.A. and B. but C. or D. however
13.A. uses B. using C. use D. used
14.A. had B. live C. led D. bear
15.A. home B. place C. life D. house
16.A. And B. But C. So D. If
17.A. that B. which C. whom D. who
18.A. later B. ago C. before D. earlier
19.A. received B. had got C. accepted D. sent
20.A. peaceful life B. earthquake C. telegram D. money
高二英语完形填空简单题查看答案及解析
Jack was once a common name，,I think, that is seldom chosen nowadays．
A．it B．one C．who D．which
高二英语单项填空简单题查看答案及解析
It was in the small mountain village _______ they used to live _______ my parents got married.
A.that; that B.where; where C.where; that D.that; where
高二英语单项填空中等难度题查看答案及解析
So seriously ____ in the accident that the driver was sent to hospital at once.
A. was he injured B. he was injured
C. did he injure D. he did injure
高二英语单项填空中等难度题查看答案及解析
Once an Arab was traveling in the desert. When the sun went down in the west, he stopped and _36_ his tent then, made a fire and have a _37_ meal. When night fell, he_38_ down to sleep.
He had_39_ fallen asleep when he felt a soft _40_ on his elbow(手肘). He woke up to find that his camel had put his head inside the tent. The camel said: “Would you please let me keep my head in the tent to get warm? It is so cold outside. I will not take up too much 41 .”
The Arab was a 42 man, “All right, do as you 43 .” he said. Then he turned on his _44_ and went back to sleep.
It wasn’t long 45 he felt a push on his shoulder. It was the camel again. “Dear master,” the camel said, “my head is quite warm now, but my neck is still cold. Do you mind 46 I keep it inside the tent, too?”
“ _47_ .” the man said. But this time he felt a bit 48 , as camel had such a long neck.
No sooner had he shut his eyes 49 he got a harder push in his side. This time the camel said, “will you please allow me to bring my front legs inside and warm then a little?”
The Arab_ 50_ over to one side of the tent. He made _51_ as small as he could. It was not _52_ comfortable, and sleep was now out of 53 .Soon after that the camel gave his a rough push and said, “The tent is too small for the two of us. 54 , my two hind legs are still left in the cold. It is only_55_ that you should leave the tent wholly to me.” And with that, the camel kicked the poor man out.
1. A．built B．made C．put up D．set
2. A．simple B．rich C．excellent D．ordinary
3. A．laid B．lay C．lied D．went
4. A．seldom B．not C．almost D．hardly
5. A．touch B．beat C．kick D．bite
6. A．place B．tent C．room D．blanket
7. A．hard-hearted B．kind-hearted C．absent-mined D．careless
8. A．please B．willing C．are like D．want
9. A．light B．head C．arm D．side
10. A．after B．before C．since D．then
11. A．whether B．as C．that D．if
12. A．Yes, of course B．No, not at all
C．Don’t, please D．No, you can
13. A．crowded B．comfortable C．warmer D．narrower
14. A．than B．then C．when D．after
15. A．went B．walked C．climbed D．moved
16. A．the tent. B．himself C．room D．ground
17. A．very B．much C．a bit D．a little
18. A．question B．the question C．quite possible D．possibility
19. A．Except B．Besides C．After all D．But
20. A．fair B．wrong C．satisfied D．right
高二英语完型填空中等难度题查看答案及解析