During the World Elephant Day on Thursday, Chinese and foreign experts gathered in one online forum(论坛)     1     ( discuss) ways to protect elephants better based on the migration(迁徙) of 15 wild elephants in Southwest China's Yunnan Province. This shows how Chinese people care about the    2     ( protect) of these giant friends.

The 15 wild Asian elephants among    3     one male turned back in July finally returned to their habitat after touring for 17 months in Yunnan Province. The case was taken by the experts as a    4     ( success) example on how to protect and guide the migration of wild elephants.

Zhou Jinfeng, Secretary of the China Biodiversity Conservation and Green Development Foundation, mentioned an idea which focused    5     helping wild animals survive by     6     (reduce) the harm to nature and wildlife in our daily lives.

Zhang Chenglin, Deputy Director of the Beijing Zoo，who introduced some measures taken by Chinese zoos to take good care of elephants,     7     (say) that there were around 150 elephants living in zo0s around China.

“    8     ( human) and animals share nature. To protect elephants     9     (be) to protect our planet. Hope we can work with other countries to protect wild animals."     10     woman wrote on Sina Weibo on the World Elephant Day.

Compared to dogs, cats are usually believed     1    (be) less friendly to humans. However, a new study shows that cats bond to us just as     2    (strong)as dogs.

Researchers at Oregon State University, in the United States, invited the owners of 117 cats to take a test,     3     is often used to test the bonds dogs have with their human     4    (caretaker).

In the six-minute test, cat owners walked into an unfamiliar room with their pets. After two minutes, the owners left the room,     5    (leave) the cats alone, which caused the cats to feel     6    (stress). When the owners returned two minutes later, about two-thirds of the cats came to greet them. The cats then     7    (go) back looking around the room, but still returned to their owners now and then. These cats, the researchers said, saw their owners    8     a source of security in an unfamiliar place. “The more we find out about cats,     9    more we're seeing that they are     10    (society) creatures,” Kristyn Vitale, lead author of the study, said.

Around       1     earth, there is a thin layer of ozone(臭氧), a kind of gas protecting us from any of the harmful rays of the sun. A few years ago, scientists in the Antarctic became aware     2     holes growing in the ozone layer. As these holes get bigger, harmful rays from the sun are     3     (increasing) reaching us,     4    (cause) crop damage and cancer. This is a big problem in countries near the polar regions, like Australia     5     skin cancer caused in part by ozone depletion (消耗)is now considered a national epidemic(流行病).

Further research into the problem showed that the ozone layer is being destroyed by gases called CFCs. These gases     6     (release) into the atmosphere by the chemicals used in aerosol cans, refrigerators and air conditioners. To help save the ozone layer, many     7     (manufacturer) have stopped producing aerosol cans that use CFCs. They have switched to other less harmful chemicals, and labeled     8     (they) cans “ozone-friendly” or “no CFCs”.

The problem of refrigerators and air conditioners has been more difficult     9     (solve). However, more and more manufacturers are now producing refrigerators and air conditioners     10     do not use CFCs. Therefore, when you go shopping you should choose ozone-friendly products. Then you will be doing something to help the environment.

Monarchs (黑脉金斑蝶) are the only butterflies known to make two-way migrations, as birds do. In the late summer and early fall, the butterflies typically leave southern Canada and northern and central     1     (region) of the United States. They make a dangerous trip to Florida and Mexico,     2     the weather is warmer. In recent years, monarch populations have been dropping dramatically. To help save the monarchy butterfly population, teens in the North Carolina community formed a club. The Monarch Butterfly Club at East Chapel Hill High School     3     (success) applied for land from the town council for the monarchs’     4     (protect). Club members hope that the garden they     5     (create) will be a safe resting place for the monarchs during     6     (they) long migration. The students plan to get more land from the community in the future. This summer, the club held events for the community. Residents of Chapel Hill were able to help club members plant milkweed for     7     young to eat. “We tell people about the club and our goals     8     (raise) awareness,” said member Kevin Guo, 16. “We’re hoping this can make a change     9     cause people to do more for the butterflies. “According to club member Reymond Zhao, also 16, the situation has to     10     (improve) as soon as possible. He has been planting milkweed in his own backyard for the past few years. “In the future, we might get more schools or clubs into this,” he said. “We need all the help we can get.”

In hundreds of cities around the world, people can use a car     1     actually owning one. It’s known as car sharing.

Car sharing works like this: people pay a fee     2     (join) a car share organization. These organizations have cars available in different parts of a city 24 hours a day. Members make a     3     (reserve) for a car, and then go to one of several parking lots in a city to pick up the car. They pay an hourly or daily rate for driving it. When they are     4     (finish), they return the car to a parking area for someone else to use.

Car sharing works well for several reasons. Some people only need to drive from time to time. Usually, people only need a car for special reasons like moving things or     5     (take) long trips. Many people don’t want the costs or responsibilities of owning     6     car. The car-share organization pays for gas insurance, cleaning and repair costs.

Members also don’t have to wait in line or fill out     7     (form) to get a car. They know a variety of cars will be available when they need one.

Car sharing also     8     (benefit) the environment. People drive only     9     they need to and fewer cars on the road means     10     (little) traffic and air pollution. As more and more cities become interested in reducing traffic, car sharing programs are becoming an effective choice.