The next few decades will see the world experience many most pressing challenges, one of which is how to ease the __（1）__ stress that human activities are placing on the environment. The consequences are just too great to __（2）__. Wildlife habitats are being degraded or disappearing altogether as new developments __（3）__ more land. Plant and animal species are becoming __（4）__ at a greater rate now than at any time in Earth’s history. As many as 30 percent of the world’s fish stocks are over-exploited. And the __（5）__ goes on.

       __（6）__, there is reason to have hope for the future. Advances in computing power and molecular biology are among the tremendous increases in __（7）__ capability that are helping researchers __（8）__ a better understanding of these problems. Recent development in science and technology could provide the __（9）__ for some major and timely actions that would __（10）__ our understanding of how human activities affect the environment.

      Improving hydrological forecasting is one priority for research. It has been __（11）__ that the world’s water use would triple in the next two decades. Already, widespread water __（12）__ have occurred in parts of China, India, and North Africa. The need for water also is taking its toll on fresh water ecosystems in the United States. Only 2 percent of the nations’ __（13）__ are considered in good condition , and __（14）__ to 40 percent of native fish species are rare to extinct.

      To prevent __（15）__ ofinfectiousdiseases in plants, animals and human, more study is needed on how parasites and disease-carrying species—as __（16）__ as humans and other species they __（17）__ ---are affected by changes in the environment. The overuse of antibiotics both in humans and in farm animals has __（18）__ to the growth of antibiotic-resistant micro organism. Researchers can take __（19）__ of new technologies in genetics and computing to better monitor and __（20）__ the effects that environment changes might have on diseases outbreaks.

For years scientists have been worried about the effects of air pollution on the earthˈs natural conditions. Some believe the    (1)   inside many houses may be more dangerous than the air outside. It may be one hundred times    (2)   .

        Indoor air pollution can  (3)   a person to feel tired, to suffer eye pain, headache and other   (4)   . Some pollutants can cause breathing disorders, diseases of blood and    (5)  cancer. Most scientists agree that every modern house has some kind of  (6)    pollution.

        People pay more    (7)    to the problem now. It is that when builders began making    (8)   and offices they did not want to waste energy. To do this they built buildings that limited the flow of air between inside and outside. They also began   (9)   man-made building materials. These   (10)    are now known to let out harmful gases.    (11)   the problem became more serious, scientists began searching for a   (12)   to deal with it. They discovered a natural pollution control system   (13)    building green plants. Scientists donˈt really know  (14)   control air pollution. They believe that a plantˈs leaves absorb or  (15)    pollutants.

 It is proved that a young scientist named Will Smith has invented a kind of advanced and intelligent robot. The small robot may help children who are _（1）__. from a long-term illness in hospital or at home.

   Whoever has had a long-term illness knows that recovering at home can be   (1)  _, as everyone can't keep them _  (2)  _, especially when their family go out to work. These children may feel   (3)   from their friends and classmates, which can be particularly _  (4)   of children. They may feel _  (5)  _. Now these children may have a high-tech friend to help _  (6)  _ the sense of loneliness. The friend is a robot, which takes their _  (7)  _ at school. Through the robot, the children can _  (8)  _ teachers and classmates. They   (9)  _ participate in class from _  (10)  _ they are recovering. Mr. Smith, the inventor _  (11)  _ how it works. He says the child uses a tablet or phone to start the robot. Then the _  (12)   uses the same device to control the robot's movements at school, the robot becomes the ears and _  (13)  _ of the child, so that he or she can take part in classroom activities—_  (14)   you're at home or from a hospital bed. The robot is _  (15)  _ with microphones that makes _  (16)  _ easy. It will become   (17)  _ to the public, for not only does it look simply cool but people can afford it. _  (18)  _, it will help some children feel _  (19)  _ lonely while they are absent from class.

In the past, man did not have to think about the protection of his environment. There were few people on the Earth, and__  (1)  __resources seemed to be__  (2)  _.

Things are now__  (3)  __. The world has become too__  (4)  __. We are_  (5)  _up our natural resources too quickly, and at the same time we are__  (6)  __our environment with dangerous chemicals. If we continue to do this, human life on the Earth__  (7)  _not survive.

Everyone__  (8)  __today that if too many fish are taken from the sea, there will soon be none__  (9)  __. Yet, with modern fishing__  (10)  __， more and more fish are caught. We know that if too many trees are cut__  (11)  __，__  (12)  __will disappear and nothing will grow on the land. Yet, we___  (13)  _to use bigger and more__  (14)  _machines to get more and more trees.

We realize that if rivers are polluted with waste products from factories, we will die. __  (15)  __， in most countries wastes are__  (16)  __put into rivers or into the sea, and there are__  (17)  __laws to stop this.

We know，__  (18)  _， that if the__  (19)  _of the world continues to rise at the present rate, in a few years there will not be enough__  (20)  _.

What can we do to solve these problems?

I took an international flight for New Zealand the past autumn.   (1)   I stepped out of the airport, I was impressed by the natural environment and attracted by the blue sky and unique plants in this _  (2)   country, where my unusual   (3)  _ began.

   I had applied a special visa, so I could enjoy great   (4)   when staying there. This freedom doesn't mean I could do anything I wanted, _  (5)   I could enjoy everything I did. It is easy to   (6)   life and work in New Zealand because every day is different.

   I picked fresh fruit in the thick forest,   (7)   wild fruit when the night came, _  (8)   sheep and chickens, planted flowers, painted a cottage and worked in a store   (9)   with balloons in the hall. I even climbed mountains,   (10)   waterfalls and played on the beach.

   I saw a lot of the North Island and would soon visit the South Island, which is said to be _  (11)  __ remote and beautiful. ___  (12)  __ is another thing worth mentioning. In a youth hostel, I met people from all over the world who could cook all sorts of food. ___  (13)  __ curiosity, I learned a lot of recipes and __  (14)  ___ different types of food, which most of the time was very delicious. In my __  (15)  _, nowhere else in the world can you enjoy __  (16)  _ food than here.

   From my __  (17)  _ in New Zealand I can conclude that the country is filled with _  (18)  _ food just waiting to be explored. As a saying __  (19)  _, "Spend any time in New Zealand, and you will get the feeling that God has only just finished his work." My mind goes that _  (20)  _ there were a Garden of Eden, it would certainly be in New Zealand.

     Eco-tourism involves people traveling to beautiful but environmental sensitive places. Such trips are  41  carried out with an experienced guide. Over recent years, this type of travel has been steadily gaining  42 as more people search for new travel experiences.

        Eco-tourism has many benefits. First, all the  43  spent by the tourists is used to 44 the important environmental spots they visit.  Second, it helps  45 to better understand the environment, thereby  46   their knowledge of the world. Furthermore, this style of travel is also more  47  of the local culture.

            Compared to   48   tourists, eco-tourists use energy more efficiently, save water and produce less rubbish by finding ways t 49   it. These behaviors have a   50   and lasting effect on the local environment.

      Two things are needed to make eco-tourism a/an  51  . First, it should be done in small groups. And second, because it requires considerable effort, both eco-tourists and locals must be 52  in their commitment to improving the environment.

       Green travel provides local people with jobs in parks,  53   and shops. One great achievement of eco-tourism has been the 54  of illegal hunting. Former hunters can now work as guides to help keep the animals 55  in their natural surroundings. Green travel also   56  local people’s quality of life, especially children’s.

         Peru is one country using eco-tourism to promote respect for the   57    . It’s now able to take better care of its rainforests because of a/an   58   on more sustainable(可持续的)travel.

         59  this, local people’s living-standards have improved. Many others are now following Peru’s   60   and using eco-tourism to preserve their environment for the future generations.

Modern inventions have speeded up people’s lives amazingly. Motor-cars   (1)   a hundred miles in little more than an hour, aircraft cross the world a day,   (2)   computers operate at lightning speed. Indeed, this love of speed seems never-ending. Every year motor-cars are produced which go even faster and each new computer boasts（吹嘘）of saving   (3)   seconds in handling tasks.

       All this saves time, but at a   (4)  . When we lose or   (5)   half a day in speeding across the world in an airplane, we get the uncomfortable feeling known as jet-lag and our   (6)   feel that they have been left behind in another time zone. Again, spending too long at   (7)   results in painful wrists and fingers.

       However, what do we do with the time we have saved? Certainly not   (8)  , or so it seems. We are so accustomed to constant activity that we find it   (9)   to sit and do nothing or even just one thing at a time. Perhaps the days are long gone when we might listen quietly to a story on the radio, letting     ___  (10)   take us into another world.

There was a time when some people’s lives were devoted   (11)   to the farming of the land or the care of cattle. No multi-tasking there; their lives went on at a much gentler pace, and in a   (12)  ___     pattern. There is much that we might   (13)   about a way of life like this. Yet before we do so, we must think of the hard tasks our ancestors faced: they farmed with bare hands,   (14)   lived close to hunger, and had to fashion tools from wood and stone.

Modern machinery has   (15)   people from that primitive existence. But attitudes towards it     ___  (16)   across generations. Some find today’s technology a   (17)  . Others consider it a curse. I suppose the positive side is that primitive existence is still   (18)   for anyone who really wants it. Anyway, computers can be shut   (19)   and most places in the world can be reached on foot. Regardless of anyone’s view on the subject, it’s hard to imagine what life would be like   (20)   daily advancements in technology.

Every day，the news of the world reaches people by over 300 million copies of daily papers，over 400 million radio sets，and over 150 million television sets.Additional news is __41__ by motion(动作) pictures，in theatres and cinemas all over the world.As more people learn what the important events of the day are，__42__ still only care for the events of their own household.Nearly four hundred years ago the English writer John Donne said，“No man is an island.”This __43__ is more appropriate(恰当的) today than it was __44__ Donne lived.In short，wherever he lives，a man __45__ to some society；and we are becoming more and more aware(清楚的) that __46__ happens in one particular society affects，somehow，the life of mankind.

Newspapers have been published in the __47__ world for about four hundred years.Most of the newspapers __48__ today are read in Europe and North America.However，__49__ they may be read in all parts of the world，__50__ to the new inventions that are changing the techniques of newspaper __51__.

Electronics and automation(自动化) have made it __52__ to produce pictures and texts far more quickly than before.Photographic copying doesn’t __53__ to use type(铅字) and printing machines.And fewer specialists, __54__ typesetters，are needed to produce a paper or magazine by the __55__ method.

Therefore，the publishing of newspapers and magazines can __56__ more money.Besides，photocopies can be sent over great __57__ now by means of television channels and satellites such as Telstar.Thus，__58__ can be brought to the public more quickly than before.

Machines that prepare printed texts for photocopies are being used a great deal today.Film，__59__ light and small，can be sent rapidly to other places and used to print copies of the text __60__ they are needed.Film pictures can also be projected easily on a movie or television screen.