题目内容

Outside，the wind to pick up，and the rain started coming down even harder.

A. has begun B. had begun

C. would begin D. is beginning

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Many of us remember being in awe(敬畏) when we saw cloned dinosaurs running wild in the film Jurassic Park. And the idea of using technology to revive(恢复) extinct species has long fascinated not only writers and directors, but scientists as well.

According to The Telegraph, woolly mammoths(长毛猛犸象), which featured in the popular Ice Age animated movie series, “may walk the earth once more” now that scientists have taken another step toward realizing a long-held dream—recreating their DNA.

Mammoths became extinct around 10,000 years ago. However, since the discovery of near-perfect preserved remains in Arctic permafrost(北极冻土带) in May 2013, a variety of research studies have been carried out since.

Geneticists from Harvard University analyzed DNA from the remains, looking for genes which separated mammoths from elephants, such as hairiness and ear size. They then used the results to reproduce exact copies of 14 mammoth genes. “It is the first time that mammoth genes have been alive—although so far it has only been done in the lab,” George Church, lead researcher of the project, told the Sunday Times.

Church then used a new technique which allows scientists to edit DNA carefully, replacing sections of elephant DNA with the mammoth genes. So “we now have functioning elephant cells with mammoth DNA in them,” he said.

However, Church ruled out the possibility of bringing the mammoths back to life via cloning from frozen remains. He said he “preferred to focus on rebuilding the full mammoth genome(基因组) by analyzing DNA from preserved remains and putting it into the cells of its closest living relative – the Asian elephant,” reported The Telegraph.

Church argued that the return of the woolly mammoth—or rather, the return of something very similar—could help bring back fragile(脆弱的) ecosystems. However, some scientists believe that bringing back the mammoth would be unethical.

Professor Alex Greenwood, an expert on ancient DNA, said: “We may face the extinction of African and Asian elephants. Why bring back another elephant from extinction when we cannot even keep the ones that are not extinct around?” he told the Sunday Times. “What is the message? We can be as irresponsible with the environment as we want. Then we’ll just clone things back?”

“Money would be better spent focusing on conserving what we do have than spending it on an animal that has been extinct for thousands of years,” he said.

1.We can learn from the article that ______.

A. cloned mammoths followed cloned dinosaurs to get revived

B. the technology to revive mammoth genes is already mature

C. George Church and his colleagues tried to reproduce mammoth DNA

D. Church and his team managed to list all the genes that separate mammoths from elephants

2.According to Church, what is the significance of his study?

A. It could help prevent the extinction of the Asian elephant.

B. It could help people better tell elephant DNA from mammoth genes.

C. It could help bring back some extinct species and save fragile ecosystems.

D. It could help bring mammoths back to life via cloning from frozen remains.

3.The underlined word “unethical” in Paragraph 7 is closest in meaning to ______.

A. unacceptable B. misled

C. impractical D. illegal

4.According to the article, Professor Alex Greenwood believes that _______.

A. there is no need to worry about the extinction of African and Asian elephants at present

B. it’s necessary to bring back species that are beneficial to human beings from extinction

C. the return of the woolly mammoth would help to balance ecosystems

D. it’s more important to protect present species than to bring back extinct ones

Limited natural resources should be made full use of ________ the ________ need of energy.

A. meeting , increasing B. to meet, increased

C. meeting , increased D. to meet, increasing

Some people surveyed tasted the sweet, salty and crunchy together with other tastes of food as they listen to different noises.It shows that louder noises reduced the reported sweetness or saltiness of food while incr eatasing the measure of crunchiness（松脆）.

It may go some way to explain Why airline food is widely complained about by both the workers and paddengers.Andy Woods,a researcher,said,“It's a general opinion that plane foods aren't fantastic,but I'm sure airlines do their best,so we wondered if there were other reasons,One thought was that perhaps the background noise may have an effect.NASA gives their space explorers very strong -tassting foods,because for some reason,they can't taste food that Strongly-^again, it may have something ti do with the background noise.”

In a studr ,48 people were fed sweet foods or salty ones, while listening tonoting or noise through earphone. Meanwhile they rated(划分等级) the foods. In noisier settings,foods were rated less or sweet than they were when it was silent,but were rated crunchier.“The evidence shows that if the background noise is loud,your food,

attention might be drawn to that, away from the food.” Dr. Woods said.

“We ae still at an early stage of progressing and this is a rather small study to really draw definitive(最完整可靠的）conclusions from,” Dr Woods said,“but they suggest that restaurants could well their choice of food for a given environment.”

Also in the group's findings there is the suggestion that the overall satisfaction with the food is also related to the degree to which people like what they are hearing .

1.How does the food taste when it is eaten m a noisy enviroment?

A. Less sallty but cronchier

B. Sweeter and saltier.

C. Sweeter but less crunchy.

D. Less sweet and crunchy.

2.Why does NASA give their space explorers very strong-tasting foods?

A. Foods become less tasty in space.

B. The explorers lose their sense of taste in space.

C. Loud noises in space may weaken The explorers' sense of taste.

D. the explorers need tastier foods to keep energetic in space.

3.what can we infer from what Dr. Woods said in the 4th paragraph?

A. The environment influences the food a restaurant sells,

B. The researchers have made an effective conclusion.

C. Music will weaken people's sense of taste while eating

D. Listening to nothing while eating is the test choice.

4.What would be the best title for the text ?

A. The best dinner environment

B. How to change p lane foods,

C. Listening to music while eating.

D. Backgrouned noise a fleets the taste of foods,

It is like a scene from a horror film：a spider web is several meters wide，which is home to thousands of spiders.And that was what Jason G．Goldman，an animal behavior researcher，found along a muddy path in the Peruvian Amazon jungle—the web arched from tree to tree，a structure containing too many spiders to count.They appeared to function as a society，just like ants or bees.

Anelosimus eximius，the species Goldman met in the rainforest，is not the only kind of social spiders in the world，but it does construct the biggest webs.Some can reach more than 7.6m long and 1.5m wide.A web of that size could contain as many as 50,000 individual spiders.

Anelosimus eximius was first discovered more than a century ago by a French scientist named Eugene Simon.More social spiders have been discovered since.One was found as recently as 2006.

An Anelosimus eximius colony(群体) contains adult males and females as well as youngsters，but the majority of spiders on the web are females. Males account for only between 5% and 22% of any colony’s population.Social spiders work together to build，maintain and clean their webs.They work together to catch prey(猎物)，and dine together when they trap a large feast.The females work together to care for the young in the colony.They feed their youngsters by vomiting(吐出) up food for them，just like mother birds.

Why did these spiders become social？Researchers have discovered three ecological(生态的) elements that often lead to cooperative(合作的) living among spiders.

Social spiders tend to feed on bigger prey，for one thing.Spiders living in places where it is difficult to hunt large or more profitable prey alone may eventually figure out that it is in their interest to work together.

1.What can we know about Anelosimus eximius from the text?

A. Its latest branch was found in 2006.

B. It was discovered by Jason G．Goldman.

C. It has been in existence for less than a century.

D. It builds bigger webs than other kinds of spiders.

2.Which of the following correctly shows the parts of an Anelosimus eximius colony?

A. B.

C. D.

3.What’s the main feature of social spiders?

A. They live on big prey.

B. They care for the young.

C. They live and work together.

D. They mainly exist in the rainforest.

4.The following paragraph would discuss .

A. new threats to spiders’ colonies

B. new research on spiders’ colonies

C. more reasons for spiders’ cooperative living

D. more species of social spiders in the world

We are not supposed to escape from difficulties in that they can our best qualities.

A. make out B. work out

C. carry out D. bring out

Remembering 70 new words a week means remembering only 10 words a day .

A. below average B. above average

C. on average D. at average

My wife is addicted to shopping on the Internet.1.seems that she can’t control herself well, just clicking constantly with the mouse. Let me tell what happened last night. It was the fourth time she2.(shop) online for hours. I had already reminded her3.(think) twice before buying anything, but my wife ignored what I said and replied confidently, “With the New Year4.(approach), preparation is necessary. Besides, I haven’t bought things on the Internet for a WHOLE week.” Hearing her words, I was really5.(speech). In most cases, the things she bought aren’t good value for money. Maybe she just enjoys6.process of buying online.

Nowadays,7.the development of technology, online shopping is becoming more and more convenient. Those8.stay at home can buy whatever they want. In the meanwhile, it causes a series of9.(problem). One of them is more spending, because people are10.(easy) attracted by the discount. So how to keep a good state of mind in front of temptation is an important lesson many people need to learn.

An agreement seems to be impossible because the majority of the committee members are ________it.

A. against B. for

C. to D. with

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