Everywhere man is altering the balance of nature.He is facilitating the spread of plants and animals into new regions, sometimes deliberately, sometimes unconsciously.He is covering huge areas with new kinds of plants, or with houses, factories, slag-heaps and other products of his civilization.He exterminates some species on a large scale, but favours the multiplication of others.In brief, he has done more in five thousand years to alter the biological aspect of the planet than has nature in five million. Many of these changes which he has brought about have had unforeseen consequences.Who would have thought that the throwing away of a piece of Canadian waterweed would have caused half the waterways of Britain to be blocked for a decade, or that the provision of pot cacti for lonely settlers' wives would have led to Eastern Australian being overrun with forests of Prickly Pear? Who would have prophesied that the cutting down of forests on the Adriatic coasts, or in parts of Central Africa, could have reduced the land to a semidesert, with the very soil washed away from the bare rock? Who would have thought that improved communications would have changed history by the spreading of disease-sleeping sickness into East Africa, measles into Oceania, very possibly malaria into ancient Greece? These are spectacular examples; but examples on a smaller scale are everywhere to be found.We make a nature sanctuary for rare birds, prescribing absolute security for all species; and we may find that some common and hardy kind of bird multiplies beyond measure and ousts the rare kinds in which we were particularly interested.We see, owing to some little change brought about by civilization, the starling spread over the English country-side in hordes.We improve the yielding capacities of our cattle; and find that now they exhaust the pastures which sufficed for less exigent stock. The following examples except _ reflect man altering the balance of nature. A) man is covering huge areas with new kinds of plants B) man is facilitating the spread of animals into new regions. C) man is killing some species on a large scale D) man is getting to know the importance of keeping the balance of nature.
C
(Question)
Forget famous goal celebration such as "The Robot" by Peter Crouch and "The Dive" by Juergen Klinsmann, here comes the South African "Diski dance". The Diski dance, which is performed through heading and kicking an imaginary ball, may be a goal celebration to watch in the following matches. South Africa's Siphiwe Tshabalala and his teammates performed this different dance when they celebrated his goal against Mexico in the opening World Cup game on Friday. The dance is already popular on YouTube and many soccer fans may want to learn the moves. Even South Africa's President Jacob Zuma has learnt the Diski dance which could be better than Cameroon Roger Milla's corner flag dance celebration in the 1990 FIFA World Cup. US actor John Travolta performed the dance shortly after landing his Boeing 707 at Lanseria airport, north of Johannesburg, on Wednesday morning. Goal celebrations are now part of the biggest sporting event and players plan them in advance just in case they find the back of the net. In football, a goal celebration is the practice of celebrating the scoring of a goal. The celebration may be performed by the goal-scorer, his or her teammates, the manager or coaches and the supporters of the team. The Robot goal celebration was so popular that England fans were surprised when Crouch, an English international footballer, said that he wouldn't be doing it any more unless England won the World Cup. The word Diski is the word used by the local people for soccer and may also describe the local style of football which focuses on dribbling and other tricks. What can we infer from the passage? A) All the footballers should have their own goal celebrations. B) Goal celebrations play an important role in football games. C) Famous goal celebrations all appeared in the World Cup games. D) Footballers often don't plan their goal celebrations ahead of time.
(Answer)
B
Ques: The Antarctica is actually a desert. It is the only continent on the earth without a river or a lake. The Antarctica is all ice all year round. The warmest temperature ever recorded there is zero, at the South Pole. Explorers used to think that a place so cold would have a heavy snowfall. But less than ten inches of snow falls each year. That is less than half an inch of water. Ten times that much moisture falls in parts of the Sahara. The little snow that falls in Antarctica never melts. It continues to pile up deeper and deeper year after year and century after century. When the snow gets to be about eighty feet deep it is turned to ice by the weight of snow above it . Antarctica has _ . A) ten times as much moisture as the Sahara. B) the same amount of moisture as the Sahara. C) about one--tenth of the moisture of the Sahara. D) none of the above.
Ans: C
More than a third of the babies born this year could receive a 100th birthday message from whoever happens to be on the throne in the second decade of the 22nd century, according to figures published by the Office for National Statistics (ONS). It forecasts that 35% of the 826,000 people born in 2012 will live to become _ . But a long life is not unalloyed good news. David Sinclair, head of policy and research at the International Longevity Centre UK, warned that for many the future may mean social isolation as they live longer than friends and members of their families. "It is of course good news that so many more people are living longer," he said, "but there is a big 'but1. We will be older, but in worse health, and at high risk of living alone. The other problem is that we are very poor at forward planning. We deal with the problems that are under our noses, but even problems two or three years away seem quite distant enough to put off.When you're talking about forecasts for a time half a century away and more, I see no evidence that we are putting in place the measures to deal with it." This year there will be 14,500 centenarians in the UK, a number which is expected to increase to 110,000 in 2035. Women have higher life expectancies than men at every age: the likelihood of a girl born this year reaching her century is estimated to be 39%; for boys the figure is 32%. The estimated number of female centenarians has risen from 500 in 1961 to more than 10,000 in 2010,a figure which is projected to reach 71,000 by 2035 and 276,000 by 2060. Men are also living far longer, although their numbers are far fewer. There were an estimated 92 male centenarians in 1961 and just below 2,000 in 2010. What does this passage mainly talk about? A) A long life is not always good news. B) A long life also means social and physical isolation C) In the future, more people will live to 100 in the UK. D) It is good to live to 100.
C