Honeybees are disappearing for unknown reasons around the United States．Last winter, bees disappeared from 23 percent of American beekeeping businesses．Causes of the phenomenon, however, have remain 题目和参考答案——青夏教育精英家教网—

题目内容

Honeybees are disappearing for unknown reasons around the United States．Last winter, bees disappeared from 23 percent of American beekeeping businesses．Causes of the phenomenon, however, have remained a mystery．
Now, scientists from several universities and the United States Department of Agriculture say they have a possible explanation for the bee decline（数量下降）．It is a little known virus called Israeli acute--paralysis virus （IAPV）．The virus kills bees．Researchers in Israel first described it in 2004 , but until now, bee experts hadn’t paid much attention to it．
When trying to find out why the bees were disappearing, a research team at Columbia University studied bee colonies （群体）, some with and the others without decline．The research turned up large numbers of two types of fungi （真菌） once suspected of causing the bee decline．The research results, however, showed that the fungi were almost as common in colonies without a decline as they were in colonies with a decline．The researchers concluded that the two fungi probably weren’t the cause．
Studies of the presence of IAPV, however, showed more interesting information．In those studies, done by a team at Pennsylvania State University in University Park, the virus showed up in 83 percent of samples from colonies with symptoms （症状）．Only five percent of samples from symptomless colonies had it．
Scientists still don’t know whether IAPIV can single--handedly cause the bee decline．They believe that even if the virus is making colonies sick , it could have a partner in crime．It’s possible, for instance, that insects or chemicals in the environment weaken bees, making them more likely to catch IAPV．
Scientists are still trying to figure out how IAPV came to the United States．The United States currently allows bee products to be imported from Canada, Australia, and New Zealand．If it turns out that this trade is spreading disease, the rules might eventually change．
【小题1】According to the passage ，IAPV is a virus that ______．

A．hasn’t attracted much attention

B．well-known to doctors and scientist

C．was first found by Austrian researchers

D．is dangerous to animals and human beings

【小题2】The underlined sentence in the fifth paragraph probably means______．

A．the virus could also cause other damages

B．there must be something that is the real cause

C．IAPV is not the only cause for the bee decline

D．the virus may be caused by the polluted environment

【小题3】From the third and fourth paragraphs, we know researchers draw their conclusions by means of _______．

A．calculating

B．comparing

C．examining

D．investigating

【小题4】What still remains unknown to American scientists according to the passage?

A．How and why to kill IAPV．

B．How IAPV came to America．

C．Whether bee products should be imported．

D．How to change the rules of the bee products trade．

【小题5】The best title for this passage would be _____．

A．Bee Disease	B．How to Kill IAPV
C．A Virus—IAPV	D．Two Types of Fungi

【小题1】A
【小题2】C
【小题3】B
【小题4】B
【小题5】A

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Valentine’s Day is on Feb. 14, and Chinese call it “lovers day”. I don’t think the translation is an accurate one, since it doesn’t only belong to lovers. Valentine’s Day is for expressing affection of all sorts. But it is uniquely for the romantically involved who shine the brightest, who spend the most money, whose hearts are the most engaged.

When I was b boy, my mother would buy enough cheap cards with ugly drawings of butterflies and little rabbits and honeybees for me to give one to every kid in my class, about 20 or so. The cards came in bags, and each card had a few foolish words-“Be Mine” or “I like you” or “You’ve Got My Heart” or the uninteresting words, “Hi, Valentine!” I would sign my name on the cards quickly and the name of one of my classmates on each easily-broken envelope. I would lick （舔）each one shut, but they were so cheap that the envelopes rarely had enough glue. On Valentine’s Day, I would take the cards to school-everyone did. We would have a party in our classroom, with cupcakes（杯形蛋糕）and juice and tiny candy hearts, which also had Valentine messages printed on them-“You’re sweet” or “Cupid（爱神丘比特）”or “Love”.

Ah, love! That’s the Valentine’s Day message: love. No one knows for certain the origin of the holiday. Several, Catholic victims were named Valentine, but it’s difficult to separate legend from fact. One story tells of a priest（牧师）named Valentine who was imprisoned and may have been stoned to death around 270 for performing marriages in going against the orders of the Roman Emperor Claudius II. But it’s hard today to find any religious connection.

From the first paragraph, why does the author say that we Chinese call Valentine’s Day “lovers’ day ”is not accurate?

A．Because only lovers would spend it.

B．Because it is only spent on Feb. 14.

C．Because it doesn’t only belong to lovers.

D．Because only those rich people could enjoy it.

A priest named Valentine was stoned to death for the sake of .

A．his not attending a ceremony on time.

B．his stealing something from the church

C．his rude words to Roman Emperor Claudius II

D．his not obeying the orders by Roman Emperor Claudius II

According to the passage, we can know Valentine’s Day may be related to .

A．religion B．sports C．entertainment D．art

When it comes to intelligence, human beings are the top dogs of the animal kingdom. But in recent years, scientists have been documenting surprising intelligence and emotional depth in animals ranging from honeybees to elephants. Here are some amazing examples.
Artistic Monkey Business
Jannet Schmid, director of the Little River Zoo in Norman, Oklahoma, learned a lot about the intelligence of capuchin monkeys. She and her busband adopted a young male, named Bailey. The capuchin particularly liked taking car rides, insisting that he insert the key and ride in the front passenger’s seat.
Now Bailey has become a devoted painter. He uses brushes to create colorful, abstract paintings, and prefers not to be disturbed.
Prairie Dog Sound
Through a variety of birdlike sounds, prairie dogs warn each other of approaching creatures. They demonstrated a surprisingly complex communication system. In his 25 years of study, Slobodchikoff, a professor of biology, has recorded them pronouncing ten nouns including hawk, deer and coyote, a number of adjectives to identify color, size and shape, and even some verbs to indicate speed.
In an ongoing study, Slobodchikoff learns that their brain contains a very extensive vocabulary. He once used his best prairie dog sound to say coyote, and they just looked at him in anger as if he had said a bad word.
Ivy League Parrot
One African grey parrot Alex is said to have the cognitive abilities of a five-year-old child. Alex can identify 50 different objects, seven colors, five shapes, quantities up to six, and the concepts of bigger, smaller, same and different.
Also Alex is considered to make reasoned decisions. During an experiment, researchers gave Alex different-colored blocks in sets of two, three and six. When asked which color group had five blocks, Alex replied, “None.” And he answered the same in repeated tests. Obviously, he interpreted the concept of “none” as an absence of quantity all on his own. That’s a lot like a high school student answering questions on a quiz show.
56.Which of the following is true?
A. Bailey is as clever as a child of five.
B. The prairie dog loves taking car rides.
C. The capuchin monkey is fond of painting.
D. Alex develops a communication system.
57.The underlined word “coyote” in Paragraph 4 refers to ________.
A. a verb                     B. an animal              C. a warning                       D. an adjective
58.The African grey parrot Alex can ________.
A. answer questions on a quiz show
B. understand the figure “7”
C. identify five colors and seven shapes
D. apply the concept of “none” correctly
59.What is the passage mainly about?
A. Animal communication                           B. Animal research
C. Animal intelligence                                  D. Animal information

阅读下列各小题，根据括号内的汉语提示，用句末括号内的英语单词完成句子，并将答案写在答题卡上的相应题号后。

1.It’s universally acknowledged that never __________ （我们能期待） a bluer sky unless we create a less polluted world．（expect ）

2.We breathed a sigh of relief at last．Had she known about the risks, she _____（也许没完成）with the operation．（go）

3.________ （急需钱）, he tried to persuade her to marry him, but she changed her mind and declined．（desperate）

4.With ________（所有人抛弃）him, he went abroad and asked for shelter．（desert）

5.My dog is too fat．It’s evident that I ________（不该喂）him with so much food．（feed）

6.______ （给我印象最深的） is the beauty of the white clouds floating in the blue sky．（strike）

7.I was very nervous because it was the first time that I ________ （受邀请） an opening banquet．（invite）

8.We wonder ________（是什么）caused so many strange things to happen．（it）

9._______ （毫无疑问）that honeybees communicate information of the feeding place to each other by dancing．（doubt）

10.It’s likely that such a question, if it can be called a question, ________ （你提的）, can’t be answered by any human beings．（raise）

Now, scientists from several universities and the United States Department of Agriculture say they have a possible explanation for the bee decline（数量下降）．It is a little known virus called Israeli acute--paralysis virus （IAPV）．The virus kills bees．Researchers in Israel first described it in 2004 , but until now, bee experts hadn’t paid much attention to it．

When trying to find out why the bees were disappearing, a research team at Columbia University studied bee colonies （群体）, some with and the others without decline．The research turned up large numbers of two types of fungi （真菌） once suspected of causing the bee decline．The research results, however, showed that the fungi were almost as common in colonies without a decline as they were in colonies with a decline．The researchers concluded that the two fungi probably weren’t the cause．

Studies of the presence of IAPV, however, showed more interesting information．In those studies, done by a team at Pennsylvania State University in University Park, the virus showed up in 83 percent of samples from colonies with symptoms （症状）．Only five percent of samples from symptomless colonies had it．

Scientists still don’t know whether IAPIV can single--handedly cause the bee decline．They believe that even if the virus is making colonies sick , it could have a partner in crime．It’s possible, for instance, that insects or chemicals in the environment weaken bees, making them more likely to catch IAPV．

Scientists are still trying to figure out how IAPV came to the United States．The United States currently allows bee products to be imported from Canada, Australia, and New Zealand．If it turns out that this trade is spreading disease, the rules might eventually change．

1.According to the passage ，IAPV is a virus that ______．

A．hasn’t attracted much attention

B．well-known to doctors and scientist

C．was first found by Austrian researchers

D．is dangerous to animals and human beings

2.The underlined sentence in the fifth paragraph probably means______．

A．the virus could also cause other damages

B．there must be something that is the real cause

C．IAPV is not the only cause for the bee decline

D．the virus may be caused by the polluted environment

3.From the third and fourth paragraphs, we know researchers draw their conclusions by means of _______．

A．calculating B．comparing C．examining D．investigating

4.What still remains unknown to American scientists according to the passage?

A．How and why to kill IAPV．

B．How IAPV came to America．

C．Whether bee products should be imported．

D．How to change the rules of the bee products trade．

5.The best title for this passage would be _____．

A．Bee Disease B．How to Kill IAPV

C．A Virus—IAPV D．Two Types of Fungi

第四部分：任务型阅读(共10小题；每小题1分，满分10分)

请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。

注意：请将答案写在答题卡上相应题号的横线上。每个空格只填1个单词。

For more than twenty years scientists have been seeking to understand the mystery of the‘‘sixth sense"of direction．By trying out ideas and solving problems one by one，they are now getting closer to one answer．

One funny idea is that animals might have a built-in compass(指南针)．

Our earth itself is a big magnet(磁体)．So a little magnetic needle that swings freely lines

itself with the big earth magnet to point north and south．When people discovered that idea about athousand years ago and invented the compass，it allowed sailors to navigate (航海)on oceanvoyages, even under

cloudy skies.

Actuallly the idea of the living compass came just from observing animals in nature．

Many birds migrate twice a year between their summer homes and winter homes．Some of them fly for thousands of kilometers and mostly at night．Experiments have shown that some birds can recognize star patterns．But they can keep on course even under cloudy skies．How can they do that?

A common bird that does not migrate but is great at finding its way home is the homing pigeon．Not all pigeons can find their way home．Those that can are very good at it，and they have been widely studied．

One interesting experiment was to attach little magnets to the birds’ heads to block their

magnetic sense—just as a loud radio can keep you from hearing a call to dinner．On sunny days, that did not fool the pigeons．Evidently they can use the sun to tell which way they are going．But on cloudy days，the pigeons with magnets could not find their way．It was as if the magnets had blocked their magnetic sense．

Similar experiments with the same kind of results were done with honeybees．These insects also seem to have a special sense ot direction．

In spite of the experiments，the idea of an animal compass seemed pretty extraordinary．How

would an animal get the magnetic stuff for a compass.

An answer came from an unexpected source．A scientist was studying bacteria that live in the

mud of ponds and marshes．He found accidentally little rod-like bacteria that all swam together in

one direction—north．

Further study showed that each little bacterium had a chain of dense particles inside，which

proved magnetic．The bacteria had made themselves into little magnets that could line up with the

earth’s magnet．

The big news was that a living thing，even a simple bacterium，can make magnetite．That led

to a search to see whether animals might have it.. By using a special instrument called magnetometer，scientists were able to find magnetite in bees and birds，and even in fish．In each

animal，except for the bee．the magnetic stuff was always in or closer to the brain．

Thus．the idea of a built—in animal compass began to seem reasonable．

The Magnetic Sense— The Living Compass
Passage outline	Supporting details
The existence of the earth magnet and the invention of the navigating compass	◇Our earth is a big magnet and a little freely (71) ▲ magnetic needle lines itself with the earth magnet to point north and south. ◇(72) ▲ on the idea above, the navigating compass was invented.
The possibility of birds’ built-in compasses	◇ One piece of evidence is the (73) ▲ of many birds between their summer homes and winter homes. ◇ Birds can recognize star patterns on clear nights and keep on course (74) ▲ under cloudy skies
The (75) ▲ on pigeons’ and bees’ built-in compasses	◇Little magnets were tied to the pigeons’ heads to (76) ▲ their magnetic sense. ◇The pigeons’ magnetic sense seemed to be affected on (77) ▲ days. ◇Similar things with the same results were done with bees.
The (78) ▲ of the magnetic stuff for the animal compass	◇Little rod-like bacteria were found by chance to swim together in the direction of (79) ▲ . ◇Some animals had a chain of dense magnetic particles in or close to the (80) ▲ inside their bodies.

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