It’s a popular belief that a fish’s memory lasts for only seven seconds. It may seem sad to think that they don’t remember what they’ve eaten or where they’ve been, and they don’t identify you or any of their friends -- every moment in their life would be like seeing the world for the first time.
But don’t be so quick to feel sorry for them. A new study has found that fish have a much better memory than we used to think. In fact, certain kinds of fish can even remember events from as long as 12 days ago. In the study, researchers from Mac Ewan University in Canada trained a kind of fish called African cichlids to go to a certain area of their tank to get food. They then waited for 12 days before putting them back in the tank again. Researchers used computer software to monitor the fish’s movements. They found that after such a long break the fish still went to the same place where they first got food. This suggested that they could remember their past experiences.
In fact, scientists had been thinking for a long time that African cichlids might have a good memory. An earlier study showed that they behaved aggressively (挑衅地)in front of certain fish, perhaps because they remembered their past “fights”. But until the latest findings, there was no clear evidence.
Just as a good memory can make our lives easier, it also plays an important part when a fish is trying to survive in the wild. “If fish are able to remember that a certain area contains safe food, they will be able to go back to that area without putting their lives at risks,” lead researcher Trevor Hamilton told Live Science.
For a long time, fish were placed far below chimpanzees, dolphins and mice on the list of smart animals. But this study has given scientists a new understanding of their intelligence.
1. According to the article, people commonly believe that _______.| A．fish can only remember part of their past experiences |
| B．fish can remember things that happened long time ago |
| C．a fish’s memory lasts for only seven minutes |
| D．fish don’t recognize any of their friends |
| A．They remember where to get food and survive |
| B．They can avoid their enemies and fight |
| C．They can easily find safe places |
| D．They can recognize their helpful mates |
| A．African cichlids tend to treat other fish aggressively. |
| B．African cichlids may remember things for 12 days. |
| C．African cichlids don’t belong to the list of smart animals. |
| D．African cichlids usually go to a certain area for food. |
| A．Fish having very bad memories. | B．Fish being smarter than we thought. |
| C．How fish improve their memory. | D．What we can learn from fish. |
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【推荐1】Polar bears in Canada’s Hudson Bay risk starvation as climate change lengthens periods without Arctic Sea ice, despite the creatures’ willingness to expand their diets.
Polar bears use the ice that stretches across the ocean surface in the Arctic during colder months to help them access their main source of prey—fatty seals. In the warmer months when the sea ice recedes (消退), they would be expected to conserve their energy and even enter a hibernation-like (类似冬眠) state.
But human-caused climate change is extending this ice-free period in parts of the Arctic, which is warming between two and four times faster than the rest of the world, and forcing the polar bears to spend more and more time on land.
New research looking at 20 polar bears in Hudson Bay suggests that without sea ice they still try to find food. “Polar bears are creative and clever, and they will search the landscape for ways to try to survive and find food resources to compensate (补偿) their energy demands if they’re motivated,” said Anthony Pango, a research wildlife biologist with the US Geological Survey and lead author of the study.
The researchers found that of the group, two bears indeed rested and reduced their total energy consumption to levels similar to hibernation, but the 18 others stayed active. The study said these active bears may have been pushed to continue to look for food, with individual animals documented eating a variety of foods including grasses, a gull, a rodent and a seal carcass. Some bears even swam long distances to find food.
But ultimately the researchers found that these foods didn’t give them as much energy as their usual prey. So, 19 out of 20 polar bears lost weight when there was no ice, which made them more likely to starve. That means that the longer polar bears spend on land, the higher their risk for starvation.
“As ice goes, the polar bears go, and there is no other solution other than stopping ice loss. That is the only solution,” Pango said.
1. What directly causes the polar bears to risk starvation?| A．Melting sea ice. | B．The loss of land. |
| C．Human activities. | D．Their increasing population. |
| A．Polar bears are willing to stay on land longer. |
| B．Polar bears can store enough energy more easily. |
| C．Polar bears prefer to starve rather than search for food. |
| D．Polar bears are struggling to find alternative food sources. |
| A．Human actions are to blame. |
| B．Reducing ice loss is an urgency. |
| C．Relocating polar bears is more practical. |
| D．Animals relying on sea ice will be extinct. |
| A．In a science journal. | B．In a travel website. |
| C．In a cooking blog. | D．In a fashion magazine. |
In the southwest African country of Namibia, and the Sahara lands of Mali further north, the desert elephant does just that.
Although not regarded as a separate species from the African elephant, the desert cousin differs in many ways. Their bodies are smaller, to absorb less heat, and their feet are larger for easier walking across sandy surfaces. They are taller, to reach higher branches. They have shorter tusks (象牙), and most importantly, longer trunks to dig for water in riverbeds.
Desert elephants can travel over 70 kilometers in search for feeding grounds and waterholes, and have a larger group of families. They drink only every 3-4 days, and can store water in a “bag” at the back of their throat, which is only used when badly needed. Desert elephants are careful feeders---they seldom root up trees and break fewer branches, and thus maintain what little food sources are available. Young elephants may even eat the dung (粪便) of the female leader of a group when facing food shortage. During drought they are unlikely to give birth to their young but with good rains the birthrate will increase greatly. Desert elephants have sand baths, sometimes adding their own urine (尿液) to make them muddy!
As we continue to overheat our weak planet, it can only be hoped that other animal species will adapt as extraordinarily well to change as the desert elephant.
1. The underlined part in Paragraph 2 means “_____”.
| A．remains in the African countries |
| B．drinks 120 liters of water a day |
| C．manages to live in desert areas |
| D．eats 150 kilograms of food daily |
| A．rarely ruin trees |
| B．drink only every 3-4 days |
| C．search for food in large groups |
| D．protect food sources for their young |
| A．stories and explanation |
| B．facts and descriptions |
| C．examples and conclusion |
| D．evidence and argument |
| A．Overheating the earth can be stopped. |
| B．Not all animal species are so adaptable. |
| C．The planet will become hotter and hotter. |
| D．Not all animals are as smart as desert elephants. |
【推荐3】A Chinese pet-cloning company has announced the birth of the world’s first cloned Arctic wolf, which was carried to term by an unlikely surrogate (替代的) mother — a beagle. 100 days after birth, the cloned female wolf pup, named Maya, and her beagle mother were unveiled to the world in a brief video at a press conference held Sep.19 by the Sinogene Biotechnology Company in Beijing.
Normally, Sinogene specializes in cloning dead pets, such as cats, dogs and horses, for private clients. But the company now wants to use its expertise to help clone endangered species for conservation purposes. “It’s a breakthrough in the protection and breeding of wild and endangered animals,” said Mi Jidong, general manager of Sinogene.
Maya was cloned using DNA collected from a fully grown Arctic wolf, also named Maya, which died in captivity at Harbin Polarland, a wildlife park in northeast China. The original Maya, who was born in Canada before being shipped to China in 2006, died due to old age in early 2021.
The cloning of Maya was successfully completed “after two years of painstaking efforts,” Mi Jidong said at the company’s press conference. Sinogene researchers originally created 137 Arctic wolf embryos (胚胎) by joining skin cells from the original Maya with immature egg cells from dogs, using a process known as somatic cell nuclear transfer (SCNT). Of those embryos, 85 were successfully transplanted into seven beagle surrogates. From those transplanted embryos, just one fully developed during pregnancy.
The researchers used beagle surrogates because there were not enough female wolves in the park for the scientists’ experiments. Luckily, dogs share enough DNA with wolves for the hybrid pregnancy to gestate (怀孕) successfully.
Maya now lives with her surrogate mother at a Sinogene lab in Xuzhou, eastern China, but the wolf pup will eventually be transferred to Harbin Polar land to live with other Arctic wolves.
1. What do we know about Sinogene?| A．It specializes in public services. |
| B．It has achieved advances in cloning. |
| C．It’s the first cloning company in China. |
| D．It’s a foreign company based in Beijing. |
| A．By adopting a new method called SCNT. |
| B．By isolating DNA from dogs’ immature egg cells. |
| C．By combining a wolf embryo with a beagle embryo. |
| D．By inserting a wolf’s skin cells into eggs from dogs. |
| A．Because their embryos guaranteed pregnancy. |
| B．Because Arctic wolves had long lived with them. |
| C．Because beagles’ DNA is identical to that of Arctic wolves. |
| D．Because Arctic female wolves used for research were limited. |
| A．To explain a study method of cloning. |
| B．To share a recent scientific achievement. |
| C．To call for the protection of engendered species. |
| D．To introduce a pioneering Chinese cloning company. |
【推荐1】If there were an app on your phone that could improve your memory, would you try it? Who wouldn’t want a better memory? After all, our memory can be easily damaged by diseases, injuries, bad mental health conditions and, most particularly for all of us, aging.
Nowadays, there are a large number of apps that provide memory training. Can they help you remember to take medicine, do better on a school exam, remember the name of the person whom you met yesterday? Some scientists question whether this is possible. Undoubtedly, many of the brain training companies today exaggerate(夸大) the benefits of using their apps.
Scientists have provided proof that brain training does not benefit everyone in the same way. It is suggested that little consideration has been given to who would benefit most from those brain training apps. Will they only be those who have some forms of memory impairment(缺陷),or those eager for self-improvement even though they are already functioning very well?
To overcome these limitations, our team has started a new study aiming to find 30,000 volunteers to help us decide which form of training may be the best for individuals. Our goal is to avoid a one-size-fits-all approach. Instead of focusing on the simple question of whether brain training works, we are considering covering the whole population in a new challenge to test for whom brain training works, and under which conditions.
1. What can affect our memory in particular?| A．Getting ill. | B．Being injured. |
| C．Being upset. | D．Getting old. |
| A．Supportive. | B．Doubtful. |
| C．Objective. | D．Optimistic. |
| A．To test whether brain training works. |
| B．To develop a training that suits all the people. |
| C．To compete with other memory training organizations. |
| D．To find the best form of training for different people. |
| A．A fashion magazine. | B．A tour guide. |
| C．A science website. | D．A personal blog. |
【推荐2】People may set an alarm on the phone or clock that sounds like this: beep beep beep. That hard, unpleasant sound may be making it harder to shake off the sleepy feeling in the morning known as grogginess. So, is there a better way to wake up? A recent study says yes. The answer is music .
The study, carried out by researchers in Australia, involved 50 people. The researchers found that people who wake up to musical alarms reported feeling more awake and alert. Stuart McFarlane, a lead writer of the study stated, "We are very surprised by these findings as one might expect a harsh beeping sound to be more successful” at waking up a person.
Sleep inertia is another term for grogginess. It means a person has a heavy feeling when waking up, and has trouble getting moving again after sleeping. McFarlane said people need to better understand sleep inertia's harmful effects on human performance later in the day.
Not everyone will experience the full effect. But for those who do, "care should be taken" when performing duties that require a top performance within this period, he said. This includes "dangerous tasks like driving or riding our bikes" shortly after waking up. The same is true for people who work in dangerous situations shortly after they wake, including firefighters and pilots.
So, what makes musical alarms better for waking up? The researchers think the music may be more successful in reducing sleep inertia because it has several tones, compared to the single tone of a "beeping" alarm. McFarlane said that the changes over time between the music tones may help increase a person's attention when waking from sleep.
And is there a kind of music that is best to wake up to? There may be, McFarlane said. "We could suggest alarm sounds that are tune full and easy to hum or sing along with. The current sounds I have been using include “ 'Close to me' by the Cure and 'Borderline' by Madonna."
No matter how you wake up, experts say, the amount of sleep you get also matters -- a lot.
1. Which of the following might be the best title for the text?| A．What is grogginess? | B．Why are musical alarms better? |
| C．Which music is the best? | D．How can we overcome grogginess? |
| A．examples of good musical alarms |
| B．more findings of the application of music |
| C．explanations about why music is more helpful |
| D．suggestions on how to sleep well and feel fresh each morning |
| A．Health | B．Fiction | C．Technology | D．Entertainment |
【推荐3】A team of scientists recently published one of the most comprehensive efforts yet to understand just how much carbon great whales absorb from the ocean, and the value that presents in the fight against climate change.
“Whales are large-bodied animals, and they live for a long time. Many of them migrate over vast distances,” said study leader Heibi Pearson, a marine biologist at the University of Alaska Southeast. “And so they have the potential to have these huge impacts on the ecosystem, including the carbon cycle.”
In their most direct impact, whale bodies hold an enormous amount of carbon that would otherwise be in the ocean or atmosphere. Twelve great whale species hold an estimated 2 million tons of carbon in their bodies, the authors found.
And that’s just the living members of the whale family. Another 62,000 tons of carbon is kept under the sea every year in the form of whale falls. When a whale dies in open water and sinks into the deep, a lifetime of collected carbon goes with it. It can take up to 1,000 years for water and elements at the bottom of the sea to cycle back up to the surface, which means that carbon is effectively sequestered for that long.
In addition, whales’ waste facilitates the growth of organisms at the base of the marine food chain, promoting the growth of carbon-consuming life throughout the ecosystem.
However, whale populations still haven’t recovered from the destructive effects of industrial whaling. Commercial hunting in the 19th and 20th centuries decreased the total mass of whales on the planet by 81%, according to the authors.
“Whales alone are not going to solve climate change, but thinking about whales as playing a role in the carbon cycle can help motivate whale conservation,” said Andrew Pershing, a co-author of the study. “There are a lot of win-wins there, and I think that’s very true of a lot of natural climate solutions.”
1. How do whales influence the climate change?| A．By storing carbon in their bodies. | B．By speeding the carbon cycle. |
| C．By absorbing carbon from the air. | D．By consuming carbon on their migration. |
| A．Employed. | B．Trapped. | C．Monitored. | D．Measured. |
| A．Their population has risen by 81%. |
| B．Their waste contributes to the ecosystem. |
| C．Whale hunting has been banned altogether. |
| D．Their death will break the marine food chain. |
| A．We can rely on whales to change climate. |
| B．Whale protection still has a long way to go. |
| C．We’ll soon win the battle against climate change. |
| D．Whale protection is beneficial to solving climate issues. |
【推荐1】Have you ever wondered how your favorite NBA team received its famous name? All NBA teams have an interesting story or a history behind their names. Some of the names reflected the city’s culture or history, others came from previous owners and many were selected through “Name the Team” contests.
For teams like the Los Angeles Lakers and the Utah Jazz, the names were not always a reflection of the city. Even though Los Angeles has no lakes, the Lakers name has been a city treasure for almost 40 years. Before going to Los Angeles, the team originated in Minneapolis, Minnesota. In1947, team officials changed the name to the Lakers to reflect the Minnesota State’s nickname, “Land of 10,000 Lakes”. The team name went unchanged after moving to Los Angeles in1960.
Because the Utah’s team originated in New Orleans, Louisiana, it was called the Jazz. In 1974, New Orleans club officials chose the name to represent the city for its reputation as the “Jazz Capital of the World”. The name stayed with the team even after they found a new home in Salt Lake City, Utah in 1979.
The original owner of the Chicago Bulls, Richard Klein, named the team the Bulls. He picked the name because a fighting bull is relentless and never quits. Klein, who founded the club in 1966, believed these qualities were necessary for a championship team and hoped his Chicago athletes would live up to the team name. The Bulls, the winner of the six NBA championships, has definitely followed the belief.
In 1967, the Indiana Pacers selected their team name in a different way from most other teams. Their decision was based on what they wanted to achieve in the NBA. Team officials chose the Pacers name because the organization wanted to set the “pace” in professional basketball.
1. Which can be the best title for this passage?| A．The Long History of NBA Teams |
| B．Interesting Stories about NBA teams |
| C．Excellent Qualities of NBA Team Officials |
| D．Stories Behind the Names of NBA Teams |
| A．The name was selected from a “Name the Team” contest. |
| B．The name shows that Los Angeles is a city with various lakes. |
| C．It was named after a city treasure, which had a long history. |
| D．The team got this name in another state, which had a lot of lakes. |
| A．New Orleans. | B．Salt Lake City. |
| C．Los Angeles. | D．Minneapolis. |
| A．He had guessed the success of the team. |
| B．People in Chicago used to like watching bullfighting. |
| C．He wished the team to have the qualities of fighting bulls. |
| D．Chicago was then a city famous for fighting bulls. |
【推荐2】Do you love food? Whether you’re a foodie or someone who just likes eating, there is so much to choose from. We know that too much of the wrong kind of food can be bad for our health, but for some people having a food allergy means eating certain things can actually be harmful — and now, it seems, this is affecting more and more of us.
An allergy is caused by the immune system fighting substances in the environment, known as allergens, that it should see as harmless. Food allergies can cause life-threatening reactions, which means people have to spend their lives following strict dietary restrictions and worrying about the ingredients of everything they consume. Allergy specialist Dr. Adam Fox says “if you look back over, say, 30 or 40 years...there are much more allergic problems around now than there were. ”
We often hear about people having allergies to dairy products and to peanuts. Last year a 15-year-old girl died after suffering a fatal allergic reaction from eating a baguette containing sesame seeds. This led to a call for better food-labeling laws.
Research has found that this problem is particularly affecting children. More and more of them are having allergic reactions to certain foodstuffs. Writing for the BBC website, Dr. Alexandra Santos from King’s College London says “food allergy now affects about 7% of children in the UK and 9% of those in Australia, for example. Across Europe, 2% of adults have food allergies. ”
So what might be the cause? Dr. Santos says the increase in allergies is not simply the effect of society becoming more aware of them and better at diagnosing them; it seems to be more environmental. She says possible factors are “pollution, dietary changes and less exposure to microbes, which change how our immune systems respond.” She points out that it’s very common for migrants who move to another country to develop asthma (哮喘) and food allergies in their new location.
A lot of work is being done to try and find a cure, but that’s not easy. So for now allergy sufferers. must watch what they eat and they must rely on clear and accurate labeling.
1. What do food allergy sufferers usually have to do before eating?| A．They need to bring their own food. | B．They have to call for an accurate labeling. |
| C．They have to ask the seller about the goods. | D．They have to look at the ingredients. |
| A．Because she has had a bad baguette. |
| B．Because she has had some sesame seeds directly. |
| C．Because the sesame seeds she had isn’t the right one. |
| D．Because she has had something containing sesame seeds. |
| A．Lily, a girl in a preschool. | B．Lucy, a freshman in a company. |
| C．John, a researcher in an institution. | D．Peter, an old man working on a farm. |
| A．Pollution. | B．Dietary changes. | C．Exposure to the air. | D．Microbes. |
【推荐3】Three divers enter a hole leading to a water-filled cave on Mexico's Yucatan Peninsula. They swim for an hour. Finally, they reach a large room 60 feet underground and about the size of two basketball courts. Here, they discover an upside-down human skull. Other bones lie nearby.
The team came across the skull in 2007. The divers then told the Mexican government about the finding. Soon the government formed a team of scientists to look into it. The group, which included archaeologist Dominique Rissolo, believed that the skull belonged to someone who lived in the last ice age. At the ice age some twenty thousand years ago, sea levels dropped and new land appeared. Over time, rain and wind ate holes into some of the land.
"The person may have died after entering the cave," Rissolo says. Then, when the ice age ended some ten thousand years ago, sea levels rose. Water flooded the cave, covering the remains.
Worrying that moving the skull might destroy it, scientists decided to examine it at its watery resting place. They collected information about the skull and other pieces of bones. They found that the bones belonged to a 15- to 17-year-old girl who lived at least twelve thousand years ago. The team named her after a type of water nymph (仙女) in Greek myths: the Naiads (Naia).
Naia is the oldest nearly complete human skeleton (骨架) ever found in the Americas. DNA tests showed that she's a direct ancestor of present-day Native Americans. Naia's DNA also matches with people native to Siberia, a part of Russia. Scientists have long thought that ancient people from this area arrived in Alaska during the last ice age. They were the first humans to live in the Americas. And Naia proves how far south they went.
In 2014 the scientists decided to bring up Naia's skull from the cave to protect it from curious divers. So it was taken to a lab, where it remains today.
1. What can we learn about the skull?| A．It was left alone in the cave. |
| B．It lay under a basketball court. |
| C．It drew the government's attention. |
| D．It was discovered by three scientists. |
| A．Scientists tried to protect it. |
| B．The temperature was fine in there. |
| C．It was against the law to take it out. |
| D．It would help scientists study the cave. |
| A．Early humans in Greece. |
| B．Early humans in Siberia. |
| C．Early humans in Alaska. |
| D．Early humans in Mexico. |
【推荐1】We talk a lot about air pollution. Here in Hong Kong we always complain about light pollution as well. Then, there is noise pollution. It's the same in many cities around the world. In Kathmandu, the capital city of Nepal, people have been complaining about/the noise made by drivers who continually sound their car horns(喇). That is until recently, when something was finally done about it.
The Chief District Officer of Kathmandu had received many complaints about horn pollution. He said that everyone felt the use of the car horn in recent years had become excessive. Researchers in Kathmandu found that for about 80 percent of the time, it really was not necessary for drivers to use their car horns. Sounding the horn to make a noise had become more of a habit. It was no longer being used as it was supposed to be used: to warn people of danger.
At the beginning of the Nepali New Year in 2017, the local government passed a law to ban the use of car horns unless used correctly.
Within six months, 11,000 fines(罚款) had been collected by the local traffic police. The e fine was about HK S360. A taxi driver in Kathmandu can make about HK S1, 000 per day, so he could lose about one-third of his money if he broke the law.
As usual, there were many complaints from drivers. They said that cows and dogs were free to walk on the roads. They always caused danger. Sounding a car horn was the only way to get them to move out of the way. And although there were quite a few traffic lights in the streets of Kathmandu, very few of them worked. This meant there was often a traffic mess.
The ban on using a car horn went ahead, and within a few weeks the streets of Nepal's capital were quieter-even though they were still just as busy. Because of the ban, drivers are a little more careful when they drive. Fewer accidents have been reported. The local government says the horn ban will now be copied in other areas of Nepal.
1. What do Hong Kong and Kathmandu have in common?| A．Both have been troubled by factory pollution. |
| B．Both have succeeded in fighting air pollution. |
| C．Both have been faced with the problem of noise pollution. |
| D．Both have received many complaints about horn pollution. |
| A．Car drivers usually use car horns unnecessarily. |
| B．The cars are becoming more and more. |
| C．Care drivers use car horns as a warning. |
| D．Everyone complain about the horn pollution. |
| A．In 2016. | B．In 2017. |
| C．ln 2018. | D．In 2019. |
| A．No traffic lights in the streets can work. |
| B．The traffic on the roads is usually very heavy. |
| C．Animals are not allowed to walk on the streets. |
| D．Drivers are required to drive on one-way streets. |
| A．It is unfair. | B．It is worrying. |
| C．It is interesting. | D．It is successful. |
【推荐2】Skillswise Delivery (递送) Services
Christmas Job Opportunities (机会)
Aged between 16 and 65 years? Need some money for Christmas?
Are you available to work at short notice?
Can you work early in the morning or late at night? We are looking for careful and patient people to help to sort and deliver parcels in the Reading area from late November until the end of December.
Pay for weekdays, including Saturdays and Sundays, will be:
Ages 16 to 17—￡4.80 per hour.
Age 18 and over—￡6.10 per hour.
So if you have good communication skills and are able to work as part of a team, we would like to hear from you.
To get an application form (申请表) please write to:
Elaine Grey, Personnel Officer, Skillswise Delivery Services, Windsor Road.
Reading, RG5 4BR
Tel:0118 932 814 (24 hr.answer phone)
Closing date: 10th November
1. Skillswise Delivery Services is looking for people who_____.| A．are young adults | B．have good qualities and certain skills |
| C．live in the Reading area | D．can work full-time |
| A．￡48.80 | B．￡19.20 | C．￡38.40 | D．￡24.40 |
| A．phone Elaine Grey |
| B．go to the office of Skillswise Delivery Services |
| C．get an application form before late November |
| D．fill in a form |
【推荐3】Chinese scientists recently have produced two monkeys with the same gene, Zhong Zhong and Hua Hua, using the same technique that gave us Dolly the sheep. These monkeys are not actually the first primates（灵长类）to be cloned. Another one named Tetra was produced in the late 1990s by embryo（胚胎）splitting, the division of an early-stage embryo into two or four separate cells to make clones. By contrast, they were each made by replacing an egg cell nucleus（原子核）with DNA from a differentiated body cell. This Dolly method, known as somatic cell nuclear transfer（SCNT）, can create more clones and allows researchers greater control over the edits they make to the DNA.
Success came from adopting several new techniques. These included a new type of microscopy to better view the cells during handling or using several materials that encourage cell reprogramming, which hadn’t been tried before on primates. Still, the research process proved difficult, and many attempts by the team failed. Just two healthy baby monkeys born from more than 60 tested mothers. This leads to many researchers’ pouring water on the idea that the team’s results bring scientists closer to cloning humans. They thought this work is not a stepping stone to establishing methods for obtaining live born human clones. Instead, this clearly remains a very foolish thing to attempt, it would be far too inefficient, far too unsafe, and it is also pointless.
But the scientists involved emphasize that this is not their goal. There is now no barrier for cloning primate species, thus cloning humans is closer to reality. However, their research purpose is entirely for producing non-human primate models for human diseases; they absolutely have no intention, and society will not permit this work to be extended to humans. Despite limitations, they treat this breakthrough a novel model system for scientists studying human biology and disease.
1. What do we know about the technology called SCNT?| A．It created the first two primates. |
| B．It may contribute to editing the DNA. |
| C．It can divide an early-stage embryo into several cells. |
| D．It produced two cloned monkeys with different genes. |
| A．Keeping a hot topic of it. |
| B．Attaching no importance to it. |
| C．Having a low opinion of it. |
| D．Adding supportive evidence to it. |
| A．To prepare for their research on human cloning. |
| B．To serve as a stepping stone to their reputation. |
| C．To help with the study of human diseases. |
| D．To raise money for holding an exhibition of novels. |
| A．Cloning humans is already on its way. |
| B．New techniques seem to be pointless. |
| C．Society won’t agree to clone another monkey. |
| D．The success rate of cloning a monkey was not high. |
