Read the following article and select the best answer. Article: Human beings have spread to every continent, sometimes driving other animal species to extinction in the process.It has become the most widely spread species on the planet, occupying mountains and valleys, deserts and jungles, shorelines and islands, yet always finding some good means of living in these widely differing environments. The total weight of all living members of the species is far heavier than that of any other animal, and the human population is now growing so rapidly that it will double within the next thirty-five years. What accounts for the success of our species? The answer, in a word, is culture. We create culture, but culture in turn creates us.We are consequently no longer the victims of the environment.We make our own social environment, inventing and sharing the rules and patterns of behaviour that shape our lives and we use our learned knowledge to make the natural environment more suitable to live in. Our shared culture is what makes social life possible. Without a culture transmitted from the past, each new generation would have to solve the most basic problems of human existence over again. It would have to think up a family system, to invent a language, to discover fire , to create the wheel, and so on. Culture frees us from relying on the slow and accidental process of physical evolution by offering us a new, purposive , efficient means of adapting to changing conditions. If we waited for natural selection to enable us to live at the North Pole, to fly to the moon, or to live under the sea , we would wait forever. Unlike other animals, we can self-consciously adapt to our environments and can adapt environments to meet our own needs. Question: According to the passage , human beings _ . - are the victims of the environment - rely on other animal species for their success - make social environment and change natural environment - change social environment and make natural environment
make social environment and change natural environment

Read the following article and select the best answer. Article: Bolivia has a population of three and a half million. About one tenth of the total population are white; one-fourth are mixed Indians and white; and more than half are full-blooded Indians. The government and the industries are under the control of the white people. The Indians today live in much the same way as their ancestors. Most of them are farmers. Many work in the mines, for mining is the most important industry on Bolivia's. Of all the mining products, tin is the most important, which makes up three-fourths of all Bolivia's exports. The eastern slopes of the Andes, since there are very few roads there, are fertile but not highly developed. The two primary means of transportation are river boats and porters. East of the hill region is the great plains where tropical plants are grown. A serious problem for Bolivia is the transport of food from the warm regions, where it is grown, to the mountainous regions, where most of the people live. Bolivia gained its independence from Spain about a hundred years ago. It has been slow in developing, but its rich resources promise a better future in it. Question: The main product Bolivia exports is _ . - tropical plants - gold and silver - tin - food
tin

Read the following article and select the best answer. Article: Scientists think it will be possible to record people's dreams and then interpret them, according to a new report. They claim to have developed a system which allows them to record higher level brain activity. Dr Moran Cerf told the journal Nature: "We would like to read people's dreams." Previously the only way to access people's dreams is for psychologists to ask about them after the event and try to interpret them. Dr Cerf hopes to eventually compare people's memories of their dreams with an electronic visualization of their brain activity. He told the BBC: "There's no clear answer as to why humans dream. And one of the questions we would like to answer is when do we actually create this dream?" The scientist believes his latest research shows that certain neurons or individual brain cells are linked with specific objects or concepts . He found that a particular neuron lit up when a volunteer thought about Marilyn Monroe. If a database was built up identifying various neurons with concepts, objects and people it would allow them to "read the subject's minds", according to Dr Cerf. However, Dr Roderick Oner, a clinical psychologist and dream expert, said that this kind of visualization would be of limited help when it came to interpreting the "complex dream narrative ". In addition to getting a detailed picture of individual neurons subjects had to have electrodes implanted deep in the brain using surgery. The Nature researchers used data from patients who had electrodes implanted to monitor and treat them for brain seizures . However, Dr Cerf said he hoped that it would be possible at a later stage to monitor people without invasive surgery .He said it would be "wonderful" to be able to read the minds of coma patients who are unable to communicate. Question: What's the main idea of the whole passage? - People can use many ways to interpret dreams. - Scientists have different opinions about dreams. - People's dreams will be recorded in the future. - We have developed a system to record higher level brain activities.
People's dreams will be recorded in the future.

Read the following article and select the best answer. Article: When many people are worried that there are no more heroes in the modern era,two university students who lost their lives to rescue drowning children have shown that heroes still exist . According to the Inner Mongolia Morning Post,the tragedy occurred on the afternoon of December 14,2002 when three school students skating on a frozen lake in Qingcheng Park in Hohhot fell through the ice into the freezing water. More than 20 university students who happened to be near the spot immediately went to the rescue of the children. Two children were quickly rescued,but the third died.The child's body was not found for three hours.Two of the rescuers,Liu Ye and Hao Longbiao,also died of cold and exhaustion . The body of Hao who took the lead in jumping into the lake was not found until the next day. A student who was unwilling to tell his name said he and his classmates from the local college were taking photos at the lake.When they heard the children's cries for help,they went to the ice hole hand in hand to rescue the children.But the ice kept breaking,causing most of them to fall into the icy water. Local residents held mourning ceremonies at the lake. Eight of the students were seriously affected by the freezing water and were being kept in hospital for further observation,but their lives were no longer in danger. Question: When the three students fell into water,the university students were _ . - skating on the ice - taking photos at the lake - holding mourning ceremonies at the lake - being kept in hospital for further observation
taking photos at the lake