A new study says one part of the human brain may become smaller as a result of a condition known as jet lag．Jet lag results from flying long distances in an airplane．People with jet lag may feel extremely tired for several days．They may also have problems thinking clearly and remembering．

　　Recently a researcher at the University of Bristol in Britain reported the findings of his jet lag study, which involved twenty young women who worked for international airlines．They had served passengers on airplanes for five years．These flight attendants flew across many countries and at least seven time zones．In the study, the flight attendants had different amounts of time to recover from jet lag．Half the women spent five days or fewer in their home areas between long flights．The other half spent more than fourteen days in their home areas．

　　The researcher took some saliva from the women's mouths to measure levels of a hormone (荷尔蒙) that increases during stress．He tested them to see if they could remember where black spots appeared on a computer screen．And he took pictures of their brains to measure the size of the brain's temporal lobes (脑叶)．

　　It was found that the women who had less time between flights had smaller right temporal lobes．This area of the brain deals with recognizing and remembering what is seen．The same group performed worse and had slower reaction times on the visual memory test．And their saliva samples showed higher levels of stress hormones．

　　The researcher believes the brain needs at least ten days to recover after a long trip．He says airline workers told him their ability to remember got worse after working on planes for about four years．Other studies have shown that increased feelings of stress can cause a loss of cells in the part of the brain that controls memory．

　　Scientists say more tests are needed to study the effects of jet lag on the brain．They want to find out if too much jet lag could permanently (永久性地) affect memory．

1．According to the text, jet lag________．

[　　]

A．can cause difficulties in speaking

B．can make people feel tired for a few weeks

C．can be only found in flight attendants

D．can be caused by flying over several time zones

2．It can be inferred from the text that ________．

[　　]

A．the conclusion is refused by many scientists

B．scientists fear that this research is not done properly

C．every scientific conclusion needs the support from many tests

D．the women who were examined in the research were not healthy

3．From the result of the research we can see that ________．

[　　]

A．the women who have a longer rest between long flights show better memory

B．the women who fly in a short time have smaller right temporal lobes

C．the women who have longer flights fail the memory test

D．the women who rest more than 14 days produce lower levels of hormones

4．What is the subject discussed in the text?

[　　]

A．The cause of jet lag．

B．A story of a group of flight attendants．

C．The importance of having enough rest after flights．

D．A research about the effects of jet lag on the brain．

Easter(复活节) is still a great day for worship, randy in baskets and running around the yard finding eggs, but every year it gets quite a bit worse for bunnies.
And no, not because the kids like to pull their ears. The culprit is climate change, and some researchers found that rising temperatures arc having harmful effects on at least five species of rabbit in the US.
Take the Lower Keys March rabbit, for instance. An endangered species that lives in the Lower Florida Keys, this species of cottontail is a great swimmer — it lives on the islands! — but it is already severely affected by development and now by rising levels. According to the Center for Biological Diversity, an ocean level rise of only 0. 6 meters will send these guys jumping to higher ground and a 0.9-meter rise would wipe out their habitat (栖息地) completely.
The snowshoe hare, on the other hand, has a color issue. Most of these rabbits change their fur color from white in the wintertime to brown in the summer, each designed to give them better cover from predators（捕食者）.  As the number of days with snow decreases all across the country, however, more and more bunnies arc being left in white fur during brown dirt days of both fall and spring, making them an easier mark for predators. Researchers know that the color change is controlled by the number of hours of sunlight, but whether the rabbit will be able to adapt quick enough to survive is a big question. The National Wildlife Federation has reported that hunters have noticed their numbers are already markedly down.
American pikas or rock rabbits, a relative of rabbits and hares, might be the firs' of these species to go extinct due to climate change. About 7-8 inches long, pikas live high in the cool, damp mountains west of the Rocky Mountains. As global temperatures rise, they would naturally migrate (迁徙) to higher ground — but they already occupy the mountaintops. They can't go any higher. The National Wildlife Federation reports that they might not be able to stand the new temperatures as their habitat beats up.
The volcano rabbit has the same problem. These rabbits live on the slopes of volcanoes in Mexico, and recent studies have shown that the lower range of their habitat has already shifted upward about 700 meters, but there are not suitable plants for them to move higher, so they are stuck in the middle. Scientists are concerned about their populations.
Native to the US, pygmy rabbits weigh less than 1 pound and live in the American West. They are believed to be the smallest rabbits in the world. Their habitats have been destroyed by development. Several populations, such as the Columbia Basin pygmy, almost went extinct and were saved by zoo breeding programs. Pygmy rabbits also rely on winter cover by digging tunnels through the snow to escape predators, but lesser snowfall is leaving them exposed.
All of this gives new meaning to dressing up in a giant bunny costume this Easter.
【小题1】The writer mentions Easter at the beginning of the passage in order to_______.

A．show the importance of Easter Day

B．introduce the issue about bunnies

C．remind people of Easter traditions

D．discuss the relationship between Easter and bunnies

【小题2】The word "culprit" ( Paragraph 2) is closest in meaning to______.

A．criminal

B．judge

C．victim

D．producer

【小题3】According to the passage, some rabbits can now be easily Uncovered by predators because they_______

A．are exposed lo more skillful hunters

B．have moved to habitats with fewer plants

C．haven't adapted themselves to climate change

D．can't change their fur color into white in the fall and the spring

【小题4】The problem faced by volcano rabbets and rock rabbits is that________.

A．both are affected by 1ess snow

B．both are affected by rising sea levels

C．neither can find enough food

D．neither can migrate to higher places

【小题5】Which best describes the writer's tone in the postage?

A．Approving.

B．Concerned.

C．Enthusiastic.

D．Doubtful.

Easter(复活节    ) is still a great day for worship, randy in baskets and running around the yard finding eggs, but every year it gets quite a bit worse for bunnies.

And no, not because the kids like to pull their ears. The culprit is climate change, and some researchers found that rising temperatures are having harmful effects on at least five species of rabbit in the US.

Take the Lower Keys March rabbit, for instance. An endangered species that lives in the Lower Florida Keys, this species of cottontail is a great swimmer — it lives on the islands! — but it is already severely affected by development and now by rising levels. According to the Center for Biological Diversity, an ocean level rise of only 0. 6 meters will send these guys jumping to higher ground and a 0.9-meter rise would wipe out their habitat (栖息地) completely.

The snowshoe hare, on the other hand, has a color issue. Most of these rabbits change their fur color from white in the wintertime to brown in the summer, each designed to give them better cover from predators（捕食者）.As the number of days with snow decreases all across the country, however, more and more bunnies arc being left in white fur during brown dirt days of both fall and spring, making them an easier mark for predators. Researchers know that the color change is controlled by the number of hours of sunlight, but whether the rabbit will be able to adapt quick enough to survive is a big question. The National Wildlife Federation has reported that hunters have noticed their numbers are already markedly down.

American pikas or rock rabbits, a relative of rabbits and hares, might be the firs' of these species to go extinct due to climate change. About 7-8 inches long, pikas live high in the cool, damp mountains west of the Rocky Mountains. As global temperatures rise, they would naturally migrate (迁徙) to higher ground — but they already occupy the mountaintops. They can't go any higher. The National Wildlife Federation reports that they might not be able to stand the new temperatures as their habitat beats up.

The volcano rabbit has the same problem. These rabbits live on the slopes of volcanoes in Mexico, and recent studies have shown that the lower range of their habitat has already shifted upward about 700 meters, but there are not suitable plants for them to move higher, so they are stuck in the middle. Scientists are concerned about their populations.

Native to the US, pygmy rabbits weigh less than 1 pound and live in the American West. They are believed to be the smallest rabbits in the world. Their habitats have been destroyed by development. Several populations, such as the Columbia Basin pygmy, almost went extinct and were saved by zoo breeding programs. Pygmy rabbits also rely on winter cover by digging tunnels through the snow to escape predators, but lesser snowfall is leaving them exposed.

All of this gives new meaning to dressing up in a giant bunny costume this Easter.

1.The writer mentions Easter at the beginning of the passage in order to_______.

A．show the importance of Easter Day	B．introduce the issue about bunnies
C．remind people of Easter traditions
D．discuss the relationship between Easter and bunnies

2.The word “culprit” ( Paragraph 2) is closest in meaning to______.

A．criminal

B．judge

C．victim

D．producer

3.According to the passage, some rabbits can now be easily discovered by predators because they_______

A．are exposed lo more skillful hunters

B．have moved to habitats with fewer plants

C．haven't adapted themselves to climate change

D．can't change their fur color into white in the fall and the spring

4.The problem faced by volcano rabbets and rock rabbits is that________.

A. both are affected by 1ess snow          

B. both are affected by rising sea levels

C neither can find enough food     

D. neither can migrate to higher places

 

Easter(复活节)is still a great day for worship, candy in baskets and running around the yard finding eggs, but every year it gets quite a bit worse for bunnies.

And no, not because the kids like to pull their ears. The culprit is climate change, and some researchers found that rising temperatures are having harmful effects on at least five species of rabbit in the US.

Take the Lower Keys Marsh rabbit, for instance. An endangered species that lives in the Lower Florida Keys, this species of cottontail is a great swimmer—it lives on the islands！—but it is already severely affected by development and now by rising sea levels. According to the Center for Biological Diversity, an ocean level rise of only 0.6 meters will send these guys jumping to higher ground and a 0.9­meter rise would wipe out their habitat(栖息地)completely.

The snowshoe hare, on the other hand, has a color issue. Most of these rabbits change their fur color from white in the wintertime to brown in the summer, each designed to give them better cover from predators(捕食者). As the number of days with snow decreases all across the country, however, more and more bunnies are being left in white fur during brown dirt days of both fall and spring, making them an easier mark for predators. Researchers know that the color change is controlled by the number of hours of sunlight, but whether the rabbit will be able to adapt quick enough to survive is a big question. The National Wildlife Federation has reported that hunters have noticed their numbers are already markedly down.

American pikas or rock rabbits, a relative of rabbits and hares, might be the first of these species to go extinct due to climate change. About 7­8 inches long, pikas live high in the cool, damp mountains west of the Rocky Mountains. As global temperatures rise, they would naturally migrate(迁移) to higher ground—but they already occupy the mountaintops. They can't go any higher. The National Wildlife Federation reports that they might not be able to stand the new temperatures as their habitat heats up.

The volcano rabbit has the same problem. These rabbits live on the slopes of volcanoes in Mexico, and recent studies have shown that the lower range of their habitat has already shifted upward about 700 meters, but there are not suitable plants for them to move higher, so they are stuck in the middle. Scientists are concerned about their populations.

Native to the US, pygmy rabbits weigh less than 1 pound and live in the American West. They are believed to be the smallest rabbits in the world. Their habitats have been destroyed by development. Several populations, such as the Columbia Basin pygmy, almost went extinct and were saved by zoo breeding programs. Pygmy rabbits also rely on winter cover by digging tunnels through the snow to escape predators, but lesser snowfall is leaving them exposed.

All of this gives new meaning to dressing up in a giant bunny costume this Easter.

36．The writer mentions Easter at the beginning of the passage in order to ________．

A．show the importance of Easter Day

B．introduce the issue about bunnies

C．remind people of Easter traditions

D．discuss the relationship between Easter and bunnies

37．The word “culprit”(Paragraph 2)is closest in meaning to ________．

A．criminal  　B．judge  C．victim  D．producer

38．According to the passage, some rabbits can now be easily discovered by predators because they ________．

A．are exposed to more skillful hunters

B．have moved to habitats with fewer plants

C．haven't adapted themselves to climate change

D．can't change their fur color into white in the fall and the spring

39．The problem faced by volcano rabbits and rock rabbits is that ________．

A．both are affected by less snow

B．both are affected by rising sea levels

C．neither can find enough food

D．neither can migrate to higher places

40．Which best describes the writer's tone in the passage?

A．Approving.  B．Concerned.

C．Enthusiastic.  D．Doubtful.

完形填空

　　Many people see a person who can't read or spell as disabled, but what does disabled really mean? Well, with Andrew Mertzit of Maryland it meant he would not be 1 to attend his school any more. Andrew's 2 is that whenever he is reading, he sees the letters p, d, q and b as a 3 and stick. Since Andrew's teachers couldn't 4 him much, Suzanne, Andrew's mother decided to take 5 in her own hands. She decided to home school Andrew. In ten months, Suzanne, a trained reading specialist tried many different 6 to help Andrew with his disability. She helped Andrew with making letters out of sand, rice and shaving cream. Now, about nine years later Andrew is 7 having some problems with reading, but certainly a lot better than before.

　　Lately researchers have been finding many different ways to help learning disabled students by 8 things like rice and shaving cream or even to get little computers. Also, nowadays there are schools all over that have programs to help disabled kids, unlike back in 1995 when Andrew had to be 9 schooled by his mother. But to help disabled students it takes about $ 8.12 billion. You probably think that's a lot of money, but if you 10 that in 1996 there were about 2.6 million kids who were disabled, it may not seem all that 11 . Even though a person may have a learning disability at a certain subject, like reading, it does not mean that he or she doesn't have a talent（才能）at something else. For example, 15 years ago when Joey Hollingsworth entered kindergarten, teachers said that Joey was very clever. Once Joey started getting 12 , his grades got lower. Lots of people just thought he was 13 and had discipline（纪律）problems. Many years later he finally was 14 for learning disabilities and found out he really did have a disability.

　　Still many people believe kids like Joey who can't read or write are lazy. It's hard to understand that 15 a person doesn't look disabled, he can have problems with learning, and it's even harder for the 16 . But now they are getting close to understanding how learning disabilities start. Brain researchers have some new equipment. These machines 17 pictures of the brain while in 18 . They're learning a lot already by examining the brains of the people who have been 19 and who have learning disabilities. It is reported that some of these damaged brain cases are 20

like the picture we see all the time on the learning-disabled cases where we don't know the cause.

　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　

(1) A.willing	B.able	C.ready	D.happy
(2) A.job	B.worry	C.disadvantage	D.disability
(3) A.picture	B.flag	C.square	D.circle
(4) A.help	B.tend	C.teach	D.treat
(5) A.matters	B.letters	C.illness	D.children
(6) A.ways	B.schools	C.hospitals	D.medicine
(7) A.never	B.already	C.still	D.always
(8) A.drawing	B.supplying	C.changing	D.spelling
(9) A.lonely	B.separately	C.joyfully	D.sadly
(10) A.imagine	B.consider	C.suppose	D.except
(11) A.proper	B.little	C.strange	D.bad
(12) A.higher	B.stronger	C.worse	D.older
(13) A.clever	B.late	C.lazy	D.careless
(14) A.questioned	B.tested	C.scolded	D.punished
(15) A.when	B.whether	C.even 　　 if	D.unless
(16) A.parents	B.teachers	C.doctors	D.researchers
(17) A.print	B.take	C.have	D.store
(18) A.moving	B.reaction	C.return	D.action
(19) A.cured	B.recovered	C.dead	D.injured
(20) 　　 A.exactly	B.never	C.hardly	D.luckily