What would you think if someone suggested knocking down St Paul's cathedral to widen the road,or pulling down Big Ben to make way for a car park? It'd be ridiculous,right? But when it comes to devastation of the natural world,we aren't so easily shocked.But we should be...or we'll be in a lot of trouble! _ Ancient forests are destroyed.Wetlands are becoming dry.Woodland is disappearing,all in the name of progress.This is bad in itself,but it's devastating for biodiversity. Biodiversity refers to the variety of plants,animals and other living things which are all inter-connected.The ecological services provided by biodiversity are vital to everyday life.The air we breathe is a product of photosynthesis by green plants.In fact,all life on earth exists thanks to the benefit of biodiversity.More than 90 percent of the calories consumed by people worldwide are produced from 80 plant species.And 30 percent of medicines are developed from plants and animals.Maintaining a wide diversity of species in each ecosystem is necessary to preserve all living things. The loss of biodiversity could be devastating."It is wrong to think that biodiversity can be reduced indefinitely without threatening humans," said Harvard University biologist Edward O Wilson,known as "the father of biodiversity".He warned,"We are about to reach a critical point beyond which biodiversity loss will be unavoidable." But what can we do? The problem is that the concept of biodiversity is so vague.People might care about giant pandas,but it is much harder to excite them about the fate of tiny sea creatures which are being boiled to death in the cooling systems of power stations along coastlines.The Guardian newspaper is trying to help.It has started the Biodiversity 100 campaign to try to convince governments around the world to take action to deal with the widespread concerns about biodiversity.This includes persuading the UK government to create a series of marine reserves to change the decrease in the sea-life caused by industrial... Edward O Wilson believes that _ . A) it doesn't matter to decrease the biodiversity B) people have done enough to preserve biodiversity C) the situation of biodiversity is very serious D) biodiversity loss has been unavoidable
C
(Question)
One day when the famous American scientist Edison was on his way home, a young man stopped him and required to have a word with him. Edison accepted his request. The young man asked, "How can you invent so many things and achieve your fame?" The scientist said, "It seems that you have been thinking of becoming famous every day." The young man nodded, "Yes. I have been dreaming of being a person as notable as you. Every minute I am thinking of how to become reputable. I don't know when I can achieve my fame (,)." Edison told him, "Don't worry, young man. If you want to be a famous man this way, you will have to wait until you die!" "Why should I?" the young man was puzzled. Edison said, "What you dream is actually a high building. You never think of how to build it with bricks . Thus the building will never come into reality . However, your story can serve as a mirror. People will remember you because of your illness and laziness. They will often speak of your name while they give warnings to their children. Aren't you a notorious person by then?" The man and Mr. Edison had a talk _ . A) in the classroom B) in the street C) in the lab D) at home
(Answer)
B
Ques: Computers are very important to modern life.Many people think that in the future computers will be used in lots of everyday life.It is thought that we won't have to go shopping because we will be able to get most things which are sold in shops on the Internet.There will be no more books because we will be able to get all texts from computers.The Internet will be used to play games, see films and buy food.Most telephone calls will be made by computers, too. Some people are glad about those new ways of shopping and communicating .Others do not think that computers will replace our old ways. Some people think that one day we will not read books made of paper. Instead, we will buy and read books using computers, which will keep many different books in them at the same time.We won't need to turn lots of pages and paper will be saved.Computerized books will be used more and more. While many people say it is a pleasure to go into shops and look at things you want to buy.It is also unlikely that many people will want to read large texts on our computers. Because paper books will perhaps be more friendly.Maybe computers won't change these two habits. Which is the main idea of this passage? A) People like going shopping B) Reading books is important C) Computers are important D) Computer can be used to play games
Ans: C
Ever walked to the shops only to find, once there, you've completely forgotten what you went for? Or struggled to remember the name of an old friend? For years we've accepted that a forgetful brain is as much a part of ageing as wrinkles and grey hair.But now a new book suggests that we've got it all wrong. According to The Secret Life of the Grown-up Brain, by science writer Barbara Strauch, when it comes to the important things, our brains actually get better with age.In fact, she argues that some studies have found that our brain hits its peak between our 40s and 60s--much later than previously thought. Furthermore, rather than losing many brain cells as we age, we retain them, and even produce new ones well into middle age.For years it's been assumed that brain, much like the body, declines with age.But the longest, largest study into what happens to people as they age suggests otherwise. This continuing research has followed 6,000 people since 1956, testing them every seven years.It has found that on average, participants performed better on cognitive tests in their 40s and 50s than they had done in their 20s.Specifically, older people did better on tests of vocabulary, verbal memory (how many words you can remember) and problem solving. Where they performed less well was number ability and perceptual speed--how fast you can push a button when ordered.However, with more complex tasks such as problem-solving and language, we are at our best at middle age and beyond.In short, researchers are now coming up with scientific proof that we do get wiser with age. Neuroscientists are also finding that we are happier with ageing.A recent US study found older people were much better at controlling and balancing their emotions.It is thought that when we're younger we need to focus more on the negative aspects of life in order to learn about the possible dangers in the world, but as we get older we've learned our lessons and are sub-consciously aware that we have less time left in life: therefore, it becomes more... Barbara Strauch probably agrees that _ . A) the young are better at handling important things B) people's brains work best between their 40s and 60s C) ageing leads to the decline of the function of the brain D) wrinkles and grey hair are the only symbols of ageing
B