Starting a wildlife conservation center is a necessary     1     important job, but it hardly brings money to its founder and so it is for Jane Thomas. She spent several years     2     (build) Motley Zoo, devoted to wildlife     3     (protect) in Redmond, Washington, but all money she made was spent straight back on the zoo. She was determined     4     (continue) to do her work, even though there was little money to reward her.

But things changed this year. “As crazy as it sounded, because of my efforts, I received a secret donation: $9,000,” Thomas said. She decided to use the money     5     was donated by a stranger this year to rescue more animals. She advertised the animal rescue on the street and received much support from     6     public.

Thomas said, “Ever since I advertised the animal rescue on the street, I     7     (attract) many people. Now when I walk on the street, many     8     (passer-by) wave and even shout to me ‘I adopted (收养)my dog from you!’ I feel     9     (shock) that people treat me     10     (nice) than ever.”

What makes the sea turn red and causes thousands of fish to die？As far back as anyone could remember，the blame was placed on the "red tides. " In 1947，scientists finally connected the red tides with a microscopic sea organism（有机体）    1    （call）the dinoflagellate.

The dinoflagellate is so tiny    2    6，000 of these organisms may be contained in    3    single drop of water. It stands on the borderline between plant and animal in its clasification. it produces its own food，as plants do. But it moves    4    （free）and eats other organisms，as animals do.

Dinoflagellates are normally only one of the many kinds of organisms found in plankton. Plankton is the name given to all very small    5    （form）of sea life. However，when the air and water    6    （be）calm and warm，dinoflagellates multiply with    7    （amaze）sped. The surface of the water appears    8    （cover）with a red carpet.

The dinoflagellates give off a poison. Many fish die. Their bodies are washed up on the beach. Beaches are not fit    9    any use. Fish that are not killed may become    10    （poison）to animals or people who eat them. Commercial fishing comes to a stop.

As dinoflagellates consume all the food and oxygen in an area，they die. After a time，the sea returns to normal. But when conditions are right，the red tide comes again.

As the major habitat of wild Asian elephants, Xishuangbanna Dai autonomous area in Yunnan province     1     (see) a significant growth in its population of elephants and other wild animals in the past few years.

Between January and May of 2021, the number of cases involving the destruction of forest resources in the area has crashed     2     76.6 percent compared with the same period last year.

All of the Asian elephants in Yunnan, the main habitat of the animal, live in the     3     (south) part of the province, which covers Xishuangbanna, and the cities of Pu’er and Lincang. Of the three, Xishuangbanna has the     4     (large) number of Asian elephants.

    5     (protect) the Asian elephant as well as other wildlife, the prefecture expanded the area of its nature reserves, which has nearly doubled from 24,000 hectares in     6     1980s to 41,466 hectares now. In 1996, a Wild Asian Elephant Valley     7     (found). It has served as the prefecture’s biggest wild animal rescue center,     8     more than 1,200 animals have been saved so far. In 2008, China’s first Asian elephant breeding base was also built in the valley.

A significant increase in the population of elephants is a     9     (reflect) of these decades-long protection efforts.     10     (know) as the top conservation species in China, the wild Asian elephant has seen its population grow to about 300 now.

【推荐1】A rainforest is an area     1    (cover) by tall trees with the total high rainfall spreading quite equally through the year. Rainforests have a great effect     2    the world environment because they can take in heat from the sun and adjust the climate. Without the forest cover, these areas would reflect     3    (much) heat into the atmosphere, warming the rest of the world. Losing the rainforests may also influence wind and rainfall patterns, potentially    4    (cause) certain natural disasters all over the world.

In the past hundred years,     5    (human) have begun destroying rainforests in search of the three major resources: land for crops, wood for paper and other products, land for raising farm animals,     6    affects the environment as a whole. For example, a lot of carbon dioxide in the air comes from burning the rainforests. People     7     (obvious) have a need for the resources from cutting trees     8    we will suffer much more than we will benefit.

Rainforests are often called the world’s drug store. More than 25% of the medicines we use today come from plants in rainforests. However, fewer than 1% of rainforest plants have been examined for their    9     (medicine) value. It is extremely likely that our best chance to cure diseases     10    (lie) somewhere in the world’s shrinking rainforests.

In the last 500 million years, there have been five mass extinction events on Earth. In the third event,     1     is known as the “Great Dying”, 90% to 96% of all species died out. Of course, species died out due to many     2     (cause). But nowadays, human activity has affected all types of species that we depend on for living. We need to take action     3     (avoid) the sixth mass extinction. We should take steps to save endangered animals and plants, and set up special areas to take care of them     4     the next extinction comes that may wipe out the entire species.