【推荐1】阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

Antarctica is one of the last real wildernesses     1     (leave) on the earth. Since it was first explored in the late 19^th and early 20^th centuries, various countries     2     (try) to use it for different purposes.

However, in 1961, 12 countries agreed to sign the Antarctic Treaty. This means that the entire area was     3     nuclear-free zone and could only be used for     4     (peace) purposes. Antarctica became the biggest laboratory in the world, with many scientists     5     (conduct) research there. Today 42 countries have signed the treaty, and have sent scientists to study in the area. Every summer, 3,000 scientists arrive to carry out a variety of research     6     (project).

Unlike the Arctic in the north,     7     is just made up of ice, Antarctica is an actual land mass. In fact, it is one     8     (ten) of the land surface of the earth. Over 140 million years ago, Antarctica was a green and living place. However, the land mass     9     (gradual) moved to the colder areas in the South, and now it is just as frozen as the Arctic.

Tourism has finally reached the great frozen wilderness. People come to see the local bird life, to go mountaineering, or to visit the South Pole.     10     we are not careful, it will not remain a wilderness for much longer.

【推荐2】阅读下面短文，在空白处填入1个适当的词或括号内单词的正确形式

Many great people in the world devote themselves to     1     (improve) society in their own ways. For example, Jane Goodall, a woman from Britain, would rather spend time studying chimps in the wild in Africa than lead     2     comfortable life. For 40 years she     3     (be) outspoken(直率的) about making the rest of the world understand and respect the life of chimps. Lin Qiaozhi, a specialist in women’s diseases, is another woman who has made great     4     (achieve). There was story after story of no matter     5     tired after a day’s work, she went late at night to deliver(接生) a baby for a poor family. It was because of her hard work and great consideration to her patients     6    hundreds of babies were delivered     7    (safe) by her. A third example is Yuan Longping, the first     8     (agriculture) pioneer in the world to grow super hybrid rice. Using his hybrid rice, farmers can produce harvests twice as large as before.     9     now the UN has more tools in the battle to reduce hunger in the world. In short, so impressive is their work that they all deserve praising and    10    (learn) from.

【推荐3】阅读下面材料，在空白处填入适当的内容（一个单词）或括号内单词的正确形式。
Animals have been killed for their fur and feathers, and     1    (thousand) of kinds of animals have disappeared from the world forever. About 170 kinds in the US alone     2    (consider) in danger.
Why should people care?     3    we need animals, and if they are gone, there will never be any more. Every animal has its place in the balance of nature.     4    (destroy) one kind of animal can create many problems. For example, when farmers killed large numbers of hawks (老鹰), the farmers’ stores of corn and grain were destroyed     5    rats and mice. With no hawks to keep down their numbers, the rats and mice multiplied (繁殖)     6    (quick).
Luckily, some people are working     7    (help) save the animals. Some groups raise money to let people know about     8    problem. And they try to get the governments to pass laws protecting animals in danger. Quite a few     9    (country) have passed laws. These laws forbid the killing of any animals on the danger list. Slowly, the number of some animals in danger     10    (be) growing.

【推荐1】阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

A new research suggests planting trees and other plants near factories could reduce pollution by almost one-third. The     1     (add) of plant life may even cost less and be more effective than technology     2     (design) to cut pollution. The findings     3     (report) in the publication Environmental Science & Technology.

The lead author of the study was Bhavik Bakshi,     4     is a professor of chemical and biomolecular (生物分子) engineering at The Ohio State University in Columbus. Bakshi and other researchers collected data about air pollution and plant life     5     48 American states.

They knew that trees and plants were absorbing large amounts of     6     ( harm) emissions from the air. So they     7     (attempt) to find out whether new vegetation (植被) could reduce air pollution's effects.

“People     8     (seek) to solve air pollution problems need to start looking at nature and learning from it,” Bakshi said. He added that nature –based     9     (method) could result in “win-win” solutions that save money and are better for the environment. The study did not identify     10     kinds of trees or plants would be best at reducing air pollution.

【推荐3】Xuexiang Village, formerly known as a forestry farm, has been transformed into a booming tourist resort.     1    (locate) at the southern foot of Changbai Mountain, it has much snow. The snow here starts falling in October and begins to melt in April. A unique scene is the “snow mushrooms”,     2     are formed after snow falls onto wood piles. Together with log cabins, pine trees and snowy mountains,     3     place looks like a fairy tale world. Several decades ago, people     4    (come) here as loggers. Years of excessive logging resulted     5     a resource-shortage problem. After the natural forest protection project     6    (launch) in 1999, the forestry farm stopped logging and started to make good use of the snow to develop the tourism industry. Amateur photographers first promoted the beautiful scenery, then, with the help of the internet, it     7    (gradual) became famous and tourists began coming.     8    (sense) the new opportunities, loggers started to open family hotels and restaurants. Nearly 80     9    (family) are now involved in tourism business. “My family can make 200,000-300,000 yuan each year, which     10    (able) us to live a much better life”, said Fan, a used-to-be logger.