Directions: Read the passage carefully. Fill in each blank with a proper sentence given in the box. Each sentence can be used only once. Note that there are two more sentences than you need.
Slower Walkers Have Slower Minds, Scientists Reveal
Of all human activities, few are so readily credited with enhancing the power of the mind as going for a good walk. However, those who assume that strolling along at a gentle pace is the symbol of superior intellect should think again, scientists have said. 1.
Doctors have long used walking speed to gain a quick and reliable understanding of older peopled mental capability, as it is increasingly recognized that pace is associated with not only muscular strength but also the central nervous system. 2. The relationship was so obvious, however, that the US scientists now say walking tests could be used to provide an early indication of dementia（痴呆）.
Published in the Journal of the American Medical Association, the study revealed an average difference of 16 IQ points between the slowest and the fastest walkers at the age of 45, This reflected both the participants’ natural walking speed and the pace they achieved when asked lo walk as fast as they could. 3. Actually, slower walkers were shown to have “speeded aging'' on a 19-measure scale devised by researchers, and their lungs, teeth and immune systems tended to be in worse shape than the people who walked faster.
The 904 New Zealand men and women who were tested at 45 were tracked from the age of three, each undergoing multiple tests over the years. The long-term data collection enabled researchers to establish that kids with lower IQ scores, lower linguistic ability and weaker emotional control tended to have slower walking speeds by middle age. 4.
The research team said genetic factors may explain the link between walking speed, brain capacity and physical health or that better brain health might promote physical activity, leading to better walking speed. Some of the differences in health and intellect may be the result of lifestyle choices individuals have made.
A. Those with a slower pace also scored less well in physical exercises such as hand-grip strength and biological markers of good health.
B. There are already signs in early life of who would become the slowest walkers.
C. In fact, based on a new series of experiments, they now believe the slower a person’s tendency to walk，the less able their brain.
D. Brain scanning during their final assessment at 45 showed the slower walkers tended to have lower total brain volume and less brain surface area.
E. Until now, however, no one knew it could signify underlying brain health so much earlier in life.
F. Researchers performed walking speed analysis on hundreds of middle-aged people, comparing their psychological results.
How and why, roughly 2 million years ago, early human ancestors evolved large brains and began fashioning relatively advanced stone tools, is one of the great mysteries of evolution. Some researchers argue these changes were brought about by the invention of cooking. They point out that our bite weakened around the same time as our larger brains evolved, and that it takes less energy to absorb nutrients from cooked food. As a result, once they had mastered the art, early chefs could invest less in their digestive systems and thus invest the resulting energy savings in building larger brains capable of complex thought. There is, however, a problem with the cooking theory. Most archaeologists (考古学家）believe the evidence of controlled fire stretches back no more than 790,000 years.
Roger Summons of the Massachusetts Institute of Technology has a solution. Together with his team, he analyzed 1.7 million-year-old sand-stones that formed in an ancient river at Olduvai Gorge in Tanzania. The region is famous for the large number of human fossils (化石) that have been discovered there, alongside an impressive assembly of stone tools. The sand-stones themselves have previously yielded some of the world’s earliest complex hand axes — large tear-drop-shaped stone tools that are associated with Homo erectus (直立人) . Creating an axe by repeatedly knocking thin pieces off a raw stone in order to create two sharp cutting edges requires a significant amount of planning. Their appearance is therefore thought to mark an important moment in intellectual evolution. Trapped inside the Olduvai sand-stones, the researchers found distinctive but unusual biological molecules（分子）that are often interpreted as biomarkers for heat-tolerant bacteria. Some of these live in water between 85°C and 95°C. The molecules’ presence suggests that an ancient river within the Gorge was once fed by one or more hot springs.
Dr. Summons and his colleagues say the hot springs would have provided a convenient “pre-fire” means of cooking food. In New Zealand，the Maori have traditionally cooked food in hot springs, either by lowering it into the boiling water or by digging a hole in the hot earth. Similar methods exist in Japan and Iceland, so it is plausible, if difficult to prove, that early humans might have used hot springs to cook meat and roots. Richard Wrangham, who devised the cooking theory, is fascinated by the idea. Nonetheless, fire would have offered a distinct advantage to humans, once they had mastered the art of controlling it since, unlike a hot spring, it is a transportable resource.
1.All of the following statements can support the cooking theory EXCEPT__________.
A.cooking enabled early humans to invest less in digestive system
B.cooking enabled early humans to devote more energy to building big brains
C.our brain became larger around the same time our digestive system weakened
D.the controlled fire wasn’t mastered until about 790,000 years ago
2.The presence of biological molecules was important because_________.
A.they suggested a possible means of cooking without fire
B.they cast light on how early Homo erectus lived
C.they provided a convenient way of studying stone tools
D.they made studies of pre-historic cultures possible
3.The underlined word “plausible” probably means _________.
A.noticeable B.applicable
C.reasonable D.affordable
4.What may be the conclusion of the study by Dr. Summons and his colleague?
A.Early humans were capable of making complex stone tools.
B.Hot springs help explain how human brains got so big.
C.Homo erectus were adaptable to tough and complex territories.
D.Human brains are highly advanced as shown by their size.
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David Miles, an Australian inventor has been accused of cheating desperate farmers by charging up to $50,000 Australian dollars for delivering rain on demand without so much as explaining the technology behind his business.
On the official Miles Research website，Miles explains that in the 1990’s he realized that it was possible to influence weather patterns by creating a bridge between ‘the present’ and a ‘near-future event’ in the physical space-time continuum. He found that by applying small amounts of energy intelligently, even a large, messy weather system approaching from the future could be eased.
While somewhat fascinating, Miles’ explanation does little to explain how he is able to bring rainfall to the lands of farmers. He makes references to famous but debatable concepts like “the butterfly effect”. “We were advised against patenting because if basically exposing how it works, there will be a lot of big companies that invest in hunting out patents,” Miles said “I understand the doubts，the only other way is to fully prove up our science and physics. If we did that, we'll lose it, it will be taken up as a national security interest and it’ll then be weaponized.”
Miles' claims raised suspicions for obvious reasons, including a since-deleted section of his company website, which claimed that his technology used “electromagnetic scalar waves”，which scientists say don’t even exist.
The Australian Competition and Consumer Commission (ACCC) has warned people against doing business with him, but the Australian inventor claims the ACCC is only trying to defame him and his company, as in reality they are success based - if it doesn’t rain, they don’t get paid.
“Consumers signed the agreement that if by the end of June they receive 100mm, they pay $50,000, if they only receive 50mm, they would only pay $25,000. Anything under half，we don’t want to be paid,” Miles said of a handful of Wimmera farmers who agreed to take him up on his offer to deliver rain.
Believe it or not, one of the farmers who paid David Miles for his so-called rain-making capabilities told ABC Radio that he was quite happy with the results.
1.David Miles claims to be capable of ________.
A.influencing the weather system
B.predicting the future events
C.reducing the atmospheric temperature
D.easing the gravitational energy
2.ACCC issued warning against doing business with Miles because________.
A.he charged too much for the services provided
B.there was no solid science to hack up his technology
C.his practice was a threat to national security interest
D.he didn’t officially patent his technology with ACCC
3.According to Miles，how much will be paid if the farmers receive 15mm of rain?
A.$50,000. B.$25,000.
C.$12,500. D.$0.
4.What can be inferred from the passage?
A.Miles needed safer facilities for his business.
B.Miles brought about good crops as expected.
C.Miles wasn’t discouraged by the critics.
D.Miles was arrested by the local police.
A star athlete stopped by my office and she was eaten up by self-criticism after committing a few errors during a weekend match. “I’m at peak _________ and I practise hard. How is this happening?” This student, like many I teach, believes she should be able to _________ the outcomes of her life by virtue of her hard work.
I study and write about resilience (复原力), and I’m noticing a(n)_________ increase in students like this athlete. When they win, they feel powerful and smart. When they fall short of what they imagine they should _________, however, they are crushed by self-blame.
We talk often about young adults struggling with failure because their parents have protected them from _________. But there is something else at play among the most advantaged in particular: a _________ promise that they can achieve anything if they are willing to work for it.
Psychologists have sourced this phenomenon to a misapplication of “mind-set” research, which has found that praising children for _________ will increase academic performance. Developed by Stanford psychologist Carol Dweck, mind-set education has spread across classrooms worldwide. But a 2018 analysis found that while praising hard work over ability may benefit economically disadvantaged students, it does not _________ help everyone.
One possible explanation comes from Nina Kumar, who argued in a research paper last year that for teens in wealthy, pressure-cooker communities, “It is not a _________ of motivation and perseverance that is the big problem. __________, it is unhealthy perfectionism and difficulty with backing off when they should, when the fierce drive for achievements is over the top.” This can __________ physical and emotional stress. In a 2007 study, psychologists Gregory Miller determined that adolescent girls who refused to give up the __________ goals showed elevated levels of CRP, a protein that serves as a marker of systemic inflammation (炎症) linked to diabetes, heart disease and other medical conditions.
The cruel reality is that you can do everything in your power and still fail. This knowledge comes early to underrepresented minorities whose experience of discrimination (歧视) and inequality teaches them to __________ what is, for now, largely beyond their control to change. Yet for others, the belief that success is always within their grasp is a setup. Instead of allowing our kids to beat themselves up when things don’t go their way，we should all question a culture that has taught them that how they perform for others is more important than what __________ inspires them and that where they go to college matters more than the kind of person they are. We should be wise to remind our kids that life has a way of disappointing us when we least __________ it. It’s often the people who learn to say “stuff happens” who get up the fastest.
1.A.coolness B.fitness C.goodness D.readiness
2.A.control B.change C.adjust D.celebrate
3.A.amusing B.inspiring C.troubling D.touching
4.A.apply B.approve C.appreciate D.accomplish
5.A.disbelief B.disagreement C.discovery D.discomfort
6.A.bright B.false C.general D.flexible
7.A.virtue B.ability C.effort D.status
8.A.originally B.obviously C.necessarily D.regularly
9.A.choice B.command C.display D.lack
10.A.Instead B.Otherwise C.Therefore D.However
11.A.result from B.apply for C.associate with D.lead to
12.A.Immoral B.impersonal C.impossible D.impolite
13.A.challenge B.accept C.assess D.inquire
14.A.plainly B.probably C.immediately D.actually
15.A.exhibit B.expect C.establish D.recognize
Directions: After reading the passage below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank.
Killer Rabbits
You’d never think of rabbits as dreadful, destructive creatures, would you? Rabbits are cute and love-able. However, Australians discovered 1. harm these cute creatures can do the hard way.
Rabbits were introduced to Australia in 1788 as food animals. By 1827, they were running around large estates, and in 1859, disaster struck. A man released 12 wild rabbits onto his property for hunting and he 2. have thought that was harmless fun. But Australia has no predators（捕食者）3. (adapt) to killing rabbits and none of the diseases that kept their populations 4. control in Europe. The loose rabbits bred like, well, rabbits, and began to take over the countryside. Within a few decades, there were millions. By 1950, there were 600 million rabbits in Australia.
Six hundred million hungry rabbits could do real harm. They caused more damage than any other species introduced to the continent. They ate native plant species 5. they disappeared. They competed for food and shelter with native animals. they caused the extinction or endangerment of numerous plant and animal species. And they were a nightmare for cattle and sheep farmers, 6. animals couldn't get enough grass to eat and starved.
The rabbits did some good, of course. They provided food for poor families. They supported fur industries. But their impact on the environment and major livestock economy was too negative 7.(ignore). People tried trapping them. They even built a huge wall against them. But 8.(effective) weapon was a virus.
9.(test) multiple times, the deadly myxoma virus was released on Australia's rabbits in 1950. The virus had been developed very carefully to affect only rabbits. Nearly 100 percent of the rabbits who caught the disease 10.(die).Populations fell. It was a huge success. Cattle and sheep farming recovered gradually, and threatened plants were better protected. Eventually, rabbits became resistant to the virus.
