1 . Working in a pet hospital, I had been called to examine a ten-year-old Irish Wolfhound(爱尔兰猎狼犬) named Belker. The dog’s owners, Ron, his wife Lisa, and their little boy Shane, were all very _________ about Belker, and they were hoping for a _________.

I examined Belker and found he was _________ of cancer. I told the family we couldn’t do _________ for Belker but perform the euthanasia procedure(安乐死) for the old dog. Ron and Lisa _________ and told me they thought it would be good for six-year-old Shane to stay _________ Belker. They _________ as if Shane might learn something from the _________.

Before the procedure, Shane seemed so _________, petting the old dog for the last time, that I __________ if he understood what was going on. Within a few minutes, Belker left the world __________.

The little boy seemed to accept Belker’s __________ without any difficulty or puzzle. We sat together for a while after my work, __________ about the sad fact that animal lives are __________ than human lives.

Shane, who had been listening quietly, __________, “I know why.” Surprised, we all __________ him. What came out of his mouth next __________ me. I’d never heard a more moving __________. It has changed the way I think and live.

He said, “People are born so that they can learn how to live a __________ life—like loving everybody all the time and being nice, right?” The six-year-old __________, “Well, dogs already know how to love others, so they don’t have got to stay as long as us.”

2 . Maggie, a girl of thirteen years old, lived on the west coast of the United States. She had never experienced an earthquake before; she only prepared for it. As long as she could remember, preparing for an earthquake was common at her school. Her family had made plans as well in case of a natural disaster.

One day, Maggie arrived home from school at the usual time. However, it was not the same as usual. She was home alone. Her mom would be driving home on the busy freeway and her dad was to arrive at the airport. He was coming home from a two-week business trip.

After finishing her homework, Maggie felt a little hungry, so she went to the kitchen to find something to eat: Just then she felt a shake, then the violent shaking. Maggie quickly ran under the large table in the dining room. The sounds of breaking glass and the crashing of many things were deafening, and Maggie hugged herself in fear.

After what seemed like a very long time, the earthquake appeared to be over. Maggie could hear the sound of water rushing below her in the basement. And there was the smell of natural gas in the air. Maggie knew where the main water valve(阀门) was and how to turn it off. Dad had ever shown her before.

Slowly and carefully she came out from under the table. The once tidy home was then almost unrecognizable. Walls had fallen down and many things in the room were in a mess. As Maggie approached the open basement door, she could see the steps. Carefully she made her way down into the dark basement.

While placing her feet firmly on the floor, Maggie felt a sudden pain as a large wood hit her head and shoulder. She fell unconscious onto a pile of boxes. An hour later, she woke up and found her parents beside her. She was happy that she was still alive!

The heat wave that broke high temperature records in five European countries a week ago is now over Greenland,     1     (cause) the surface of the island’s vast ice sheet to melt at near-record levels and a huge     2     (lose) of ice in the Arctic. On Wednesday alone, more than 10 billion tons of ice was lost to the oceans by surface melt, which is equal to about 4,000,000 Olympic-sized swimming pools.

Melting     3     (increase) in recent decades because of climate change and has been decreasing accumulation from snow. Previously, during the 1970s and the 1980s, Greenland lost an average of 50 billion tons of ice each year. From 2010 to 2018,that figure shot up to 290 billion Tons     4     (annual). Next summer, the extent of the melt could surpass (超过) the record set in 2012,    5     about 97% of the ice sheet’s surface began to melt, NASA-JPL Caltech reported at the time.

Greenland, the world’s     6       (large) island, lies between the Atlantic and Arctic oceans, with 82 per cent of its surface covered in ice.     7     June 2019 study by scientists in the U.S. and Denmark said melting ice in Greenland alone would add between 5 and 33 centimeters to the rising     8     (globe) sea levels by the year 2100.     9     all the ice in Greenland melted, which would take centuries, the world’s oceans would rise     10     7.2 meter.

4 . I strongly believe that individual actions make a difference to our environment. I’ve been a vegetarian for more than two decades, choose to be child-free partially because I can’t justify my genes’ importance over the shocking amount of resources needed for raising another American, and haven’t owned a car in four years. Those things, over time, will absolutely reduce my impact on our beautiful world, and the more people do them, the greater the impact is.

But it’s not nearly enough.

While I will continue to do my part to fight climate change, I have to wonder why there isn’t an equal effort by those who have the biggest impact. According to a recent report, 71% of greenhouse gases are produced by just 100 companies. Surely, working to minimize their emissions (排放物) will do far more, much faster than me talking people’s ears off on Facebook about eating less meat. After all, I have been doing that kind of work for 20 years now, and we are still headed towards climate disaster.

Why should so much of the solution to global warming be on the shoulders of individuals?

When President Kennedy decided we needed to beat the Russians to the moon landing, he didn’t encourage housewives to figure out bow to get there. He got the smartest and most talented people together to solve the challenges. NASA got us there, with lots of hard work and late nights, and also full encouragement and funding from the US government.

But this is not the case with climate change. Big companies are let off the hook while we take on the huge burden of dealing with the emissions of the biggest and most powerful. That strikes me as just plain unfair. The serious threats of climate change require an all-hand-on-deck response. Corporations need to do their part, because I can’t do it on my own.

5 . For centuries, historians and archaeologists have defined periods of human history by the technologies or materials that made the greatest impact on society — like the Stone Age, Bronze Age, or Iron Age. But what age are we in now? For some researchers, according to Atlas Obscura’s Cara Giamo, that question can be answered with one word: plastics.

“Plastic has redefined our material culture and the artifacts we leave behind. It will be found in stratified (分层) layers in our trash deposits (沉积层)” That’s according to archaeologist John Marston.

The wide variety of synthetic polymers (合成聚合物) would not exist if it weren’t for human action. Since the first plastic polymers were invented, about six billion tons of plastics have been made and spread around the planet, from forests to oceans ever since the first plastics polymers were invented.

Plastics are one of the most significant changes that humans have made to the Earth’s makeup. Most plastics don’t easily degrade. This only adds to the problem. Recycling isn’t an adequate solution. Not all types of plastic are easily recyclable. And there are only a few recycling plants that can process all varieties of plastic.

According to Debra Winter, writer for The Atlantic, this means that many of the materials thrown into recycling bins can cross the planet several times before they are processed. They are made into produce rugs, sweaters, or other bottles. Although millions of tons of plastic are recycled every year, millions more end up in landfills or the ocean. The problem has reached the point where it’s possible that in just a few decades there might be more plastic in the world’s oceans than fishes.

“Plastics have a supposed life span of over 500 years, it’s safe to say that every plastic bottle you have used exists somewhere on this planet, in some form or another,” Winter writes. 

The damage may already be done. It may be too late for human populations worldwide to change their plastic-using ways. So the Plastic Age might soon take its place next to the Bronze Age and the Iron Age in the history of human civilization.

7 . In habitats across the planet, animals periodically drop everything to walk, fly or swim to a new place. Some animals such as whales and geese learn migration paths by following their parents. Others, including small songbirds, gain the distance and direction of their migration within their genetic code. And some animals use a combination of genetics and culture to guide their migration.

Another group of migrators does not quite fit either model, and researchers have only recently started to figure out how they find their way. The Cory’s shearwater is an oceangoing seabird that migrates over the Atlantic every year. The young do not migrate with their parents, so culture cannot explain their journeys. And the exact paths vary wildly from individual to individual, making genetics equally unlikely.

Cory’s shearwaters are long-lived, rarely producing young successfully before age nine. This leaves an opening for learning and practice to develop their migration patterns. Researchers call this the “exploration-refinement”, and until now it has been hypothetical (假设的) because of difficulties in tracking migratory animals’ movements.

But a team of researchers has done that by attaching small geolocators to more than 150 of the birds aged four to nine. They found that younger birds traveled longer distances, for longer periods, and had more diverse paths than older birds. “We finally have evidence of the ‘exploration-refinement’ for migratory birds,” says Letizia Campioni, who led the study. Younger Cory’s shearwaters are able to fly just as fast as the adults——but they do not, suggesting that the young do more exploring, which gradually fades as they mature and settle into a preferred course.

“Although it may seem less efficient than other strategies, exploration refinement could be beneficial to birds and other organisms in a rapidly changing world due to unpredictable man-made changes,” says Barbara Frei. “It might be safer to repeat a behavior that was recently successful than to rely on patterns that were perfected long ago but might no longer be safe.”

8 . A five-­year-­old dog named Kelsey has been praised as a hero for helping to save the life of her owner who slipped in the snow and broke his neck.

The man, Bob, was alone when he left his farmhouse on New Year’s Eve to collect firewood.Expecting a journey of only several meters, Bob was wearing just long johns (衬裤), a shirt and slippers when he went outside, although the temperature was around －4℃.

After the accident, he was unable to move in the snow. Fortunately, Kelsey came to his assistance.

“I was shouting for help, but my nearest neighbor is about 400 meters away, and it was 10:30 p. m.,” Bob explained. “By the next morning, my voice was gone and I couldn’t yell for help, but Kelsey didn’t stop barking.”

Kelsey’s companion kept him warm by lying on top of him. She licked his face and hands to keep him awake. “Kelsey kept barking but never left my side,” Bob recalled. “I knew I couldn’t give up and that it was my choice to stay alive.”

Bob spent 20 hours in the freezing cold. When he finally lost consciousness, his dog kept barking. Finally, hearing the barking, Bob’s neighbor discovered him at 6:30 p. m. on New Year’s Day and called the emergency services at once. When Bob arrived in hospital, his body temperature was below 21℃. However, doctors were surprised to find that he didn’t have any frostbite (冻疮). They believed it was because of Kelsey’s determination to keep him warm. Dr. Chaim Colen, the doctor who treated Bob, said, “His dog really saved him.He was very fortunate.”

Bob said he was very grateful to both Dr. Colen and his Kelsey. “They saved my life. They are truly heroes!”

9 . Afroz Shah, a lawyer in Mumbai, hasn’t had a weekend off in four years. But he hasn’t spent this time preparing for _________.

His mission? Saving the world’s oceans from _________ pollution.

It’s a calling he found in 2015 after moving to a community in Mumbai called Versova Beach. He had played there as a child and was_________to see how much it had _________. The sand was no longer _________ because it was covered by a layer of garbage more than five feet thick — most of it plastic waste.

“The whole beach was like a_________of plastic,” he said. “It hurt me. The _________ mess.” What Shah had seen is part of a global environmental crisis. More than 8 million tons of plastic _________in the world’s oceans each year. It’s predicted that by 2050, there will be more plastic in the ocean than fish. “Plastic in the ocean is a _________. And the sea species have no choice at all, ” Shah said. “We are ______________ their habitats.”

In October 2015, Shah began ________________ up plastic waste from the beach every Sunday morning. At first, it was just him and a neighbor, and then he began calling on others to join in. Word ________________ and with the help from social media, more volunteers got ________________.

For Shah, the work has always been a ________________ journey, but it has earned global attention. After he was ________________ as a Champion of the Earth by the United Nations in 2016, Shah now devotes nearly all of his free time to this ________________.

He’s now spent 209 weekends on this mission, ________________ more than 200,000 volunteers, some of whom are young students, to join him in what’s been called the world’s biggest beach cleanup. By October 2018, Versova Beach was ________________ clean and Shah’s cleanups expanded to another beach as well as a stretch of the Mithi River and other regions of India.

“This world talks too much. I think we must talk ________________ and do action more, ” he said when interviewed by CNN in October 2019.“We are a smart species. Well adapt. We’ll learn. And with these youngsters rising up, I see ________________.”

10 . Steven Stein likes to track garbage trucks. He says, “It’s hard to resist.” Stein’s strange habit makes sense when you consider that he’s an environmental scientist who studies how to reduce litter, including stuff that falls off garbage trucks as they run down the road. What is even more interesting is that one of Stein’s current plans is defending an industry behind a source of trash: plastic shopping bags.

Americans use more than 100 million plastic bags every year. So many end up in tree branches or along highways that a growing number of cities are banishing (排除) them from checkout lines. The bags are outlawed in some places in the USA.

Facing these situations, plastic-bag manufacturers are hiring scientists like Stein to make the case that their products are not as bad for the planet as most people assume. “It’s important to base your decisions on facts,” says Stan Bikulege, CEO of Hilex Poly, which has hired Stein.

Among the bag makers’ argument: many cities with bans still allow shoppers to purchase paper bags, which are easily recycled but require more energy to produce and transport. And while plastic bags may be ugly to look at, they represent a small percentage of all garbage on the ground today.

The industry has also taken aim at the product that can take the place of plastic bags: reusable shopping bags. The sturdier a reusable bag is, the longer its life and the more plastic-bag use it cancels out. But this plan has another side. Longer-lasting reusable bags often require more energy to make.

Environmentalists don’t agree with these points. They hope paper bags will be banned someday too and want shoppers to use the same reusable bags for years. So are reusables our destiny? The answer is probably yes. And Andy Keller, inventor of reusable polyester (聚酯纤维) bags, says, ”If you can carry it out in your hands or put it back in your car, you don’t need a bag.”