题目内容
（请给出正确答案）
A．time
B．end
C．moment
D．turn
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A．showed
B．is shown
C．was shown
D．has been shown
READING PASSAGE 2
You should spend about 20 minutes on Questions 14-27 which are based on Reading Passage 2 below.
IT'S ECO-LOGICAL
Planning an eco-friendly holiday can be a minefield for the well-meaning traveller, says Steve Watkins. But help is now at hand
If there were awards for tourism phrases that have been hijacked, diluted and misused then 'ecotourism' would earn top prize. The term first surfaced in the early 1980s reflecting a surge in environmental awareness and a realisation by tour operators that many travellers wanted to believe their presence abroad would not have a negative impact. It rapidly became the hottest marketing tag a holiday could carry.
These days the ecotourism label is used to cover anything from a two-week tour living with remote Indonesian tribes, to a one-hour motorboat trip through an Australian gorge. In fact, any tour that involves cultural interaction, natural beauty spots, wildlife or a dash of soft adventure is likely to be included in the overflowing ecotourism folder. There is no doubt the original motives behind the movement were honourable attempts to provide a way for those who cared to make informed choices, but the lack of regulations and a standard industry definition left many travellers lost in an ecotourism jungle.
It is easier to understand why the ecotourism market has become so overcrowded when we look at its wider role in the world economy. According to World Tourism Organisation figures, ecotourism is worth US$20 billion a year and makes up one-fifth of all international tourism. Add to this an annual growth rate of around five per cent and the pressure for many operators, both in developed and developing countries, to jump on the accelerating bandwagon is compelling. Without any widely recognised accreditation system, the consumer has been left to investigate the credentials of an operator themselves. This is a time-consuming process and many travellers usually take an operator's claims at face value, only adding to the proliferation of fake ecotours.
However, there are several simple questions that will provide qualifying evidence of a company's commitment to minimise its impact on the environment and maximise the benefits to the tourism area's local community. For example, does the company use recycled or sustainable, locally harvested materials to build its tourist properties？ Do they pay fair wages to all employees？ Do they offer training to employees？ It is common for city entrepreneurs to own tour companies in country areas, which can mean the money you pay ends up in the city rather than in the community being visited. By taking a little extra time to investigate the ecotourism options, it is not only possible to guide your custom to worthy operators but you will often find that the experience they offer is far more rewarding.
The ecotourism business is still very much in need of a shake-up and a standardized approach. There are a few organisations that have sprung up in the last ten years or so that endeavour to educate travellers and operators about the benefits of responsible ecotourism. Founded in 1990, the Ecotourism Society (TES) is a non-profit organisation of travel industry, conservation and ecological professionals, which aims to make ecotourism a genuine tool for conservation and sustainable development. Helping to create inherent economic value in wilderness environments and threatened cultures has undoubtedly been one of the ecotourism movement's most notable achievements. TES organises an annual initiative to further aid development of the ecotourism industry. This year it is launching 'Your Travel Choice Makes a Difference', an educational campaign aimed at helping consumers understand the potential positive and negative impacts of their travel decisions. TES also
A．YES
B．NO
C．NOT GIVEN
根据以下内容回答题：
No one knows for sure why birds migrate．One theory of migration says that ancient birds of the northern part of the earth were forced southward during the Ice Age，when ice covered large parts of Europe，Asia and North America．As the ice melted，the birds came back to their homelands，spent the summer，and then went south again in winter．Gradually，these comings and goings became habits，and birds now migrate though much of the ice has gone．
Another theory proposes that the ancient home of all modern birds was the tropic areas．There lived so well that the region became overcrowded．Many species had to move northward．During the summer，these birds found plenty of room and food．In winter，however，food be-came scarce and they had to return to the south．
A newer theory is that increasing daylight stimulates certain glands(腺)in the bird’s body and prepares it for migration．One scientist is able to make birds migrate in midwinter by expo-sing them for two months to artificial daylight．Recoveries of marked birds indicate that they fly north as soon as they are set free．The conclusion is that the urge to migrate is determined by changes in the bird’s body which take place under seasonal changes in the length of daylight．
This theory would account for the fact that not all birds migrate at the same time．Each sDecies seems to have its own schedule．The theory would also account for the regular time and rou‘tes of migration．Birds arrive at a given place year after year．Unfavorable weather delays them only a few days．Total hours of daylight，rather than weather，start them on the way．
How birds find their way to the same place year after year and why they follow their own Darticular route are still mysteries．They evidently do not follow known landmarks，for many young birds migrate alone without the help of experienced adults．
We can conclude from the first paragraph that__________ ． 查看材料
A.during the Ice Age，the whole Europe was covered with ice
B.the south used to be the homelands of all birds
C.scientists can confidently explain why birds migrate now
D.migration of birds can be explained by the change of ice on earth
When presented with the first price, she ___ with delight.
A、beamed
B、laughed
C、cried
D、smiled
It was a year ago ________ I first met him here.
A、which
B、that
C、in which
D、when
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