1 . Standing on the shore of a lake, I can’t help but feel surprised at the thousands of small rocks that surround my boots. They were all created from _________ surfaces, their edges softening over time. I wonder, “Can we learn from a pile of rocks?”

Even the tallest mountains have _________; none are as tall as they were 1,000 years ago. And much like a rock, I’ve found my _________ has softened and my desire to better understand others has expanded with each trip around the sun.

_________, I was also a sharp rock covered in pointy edges. Today, after decades of the waters of life coursing over me, my edges are softer and I’m more _________. I’m less likely to judge and more interested in learning how we can _________ together.

But I’m not a _________. I’m a human filled with all the drama built into my DNA.

Two years ago, while traveling in the Pacific Northwest, I watched a restaurant owner ask several young men to _________ for not wearing masks. Not _________ and not rude. On the door read a sign, “Please wear a mask before entering our restaurant. We don’t like it either, but let’s all do what we can to __________ this together.”

The group of young men wanted to __________ about the note. I sat at the restaurant watching, understanding both sides. I’ve been one of them before, using my youthful edges to chip away at (削弱) the world. What I lost, __________, was the ability to grow from __________ by looking through the eyes of others. In learning to be more __________, I’ve also found more happiness and success.

You can fit more rounded rocks in a jar than those with sharp edges. The former look for ways to __________ and make room for others, while the latter never give an __________ to accommodate others.

__________, like the waters rolling against once sharp stones, changes us by washing away our resistance to __________ the world from someone else’s point of view.

I placed a __________ stone into my jacket pocket. Mother Nature is holding a __________ again.

2 . Antarctica is the continent which is the most southern area of land on the Earth and is mostly ________ with ice. This is one of the driest and ________ places in the world. But people from all over the world come to ________ there. Near the South Pole, three thousand people live together in a place ________ Amundsen­Scott Station.

The Station ________ libraries, cinemas, shops, sports rooms, canteens and laboratories. There is electricity, and they have telephone — the system ________ they use to have a conversation with someone in ________ place. And they have     ________ — electronic machines that store information and use programs to help them find, organize, or change the information.

But the people here ________ travel by car, or train or bus, because there aren’t any roads or railways near the Station. They ________ by ship, helicopter, plane, or snow tractor, or ________ dogs.

There aren’t ________ trees or flowers there, but there are hundreds of different birds and other ________.

Most of the people here are________. They study plant and animal life and how ice ________. The ice can ________ us about changes in climate. Ray Kingman is an expert at Amundsen­-Scott Station, telling us ________ the phone, “This is my second year here. It’s a very interesting and beautiful place, but life is very ________ in winter. In summer we can go ________ in hot pools of water. We welcome newcomers here for further ________ of the continent！”

3 . Earthquakes are common; thousands of them happen each day. But most are too _________ to feel. During a _________ earthquake, there is often a great noise first. Then the earth _________ terribly and many houses _________ down. Railway tracks break and trains go _________ lines; a great many factories are _________; thousands of deaths are caused, and many more lose homes… _________ the great damage and deaths caused by the earthquake _________, other disasters such as fires often _________. More buildings are destroyed and more __________ caused.

Man knows the __________ of a possible earthquake, and for centuries man has been making researches on earthquakes. More than 2, 000 years ago, __________, a Chinese scientist named Zhang Heng __________ a machine which could find out from which __________ the seismic waves had come, and this machine is still __________ by scientists today. Now we know much more about earthquakes and __________ they happen, but we still cannot __________ exactly when and where an earthquake will happen, and cannot __________ it from happening. So earthquakes are among the __________ disasters in the world.

No one can stop natural earthquakes. __________, scientists can help stop earthquakes destroying whole cities and causing too many deaths.

4 . Ask people to name the world's tallest peak and anybody with sound general knowledge will name Mount Qomolangma. But quiz them on its exact __and many will be not sure.

In 1975, Chinese surveyors __ that Mount Qomolangma （Mount Everest） was 8848. 13 meters high. As __ improved, satellites, photoelectricity, radars and gravity measurement technologies were __ to get more exact figures. Of course, someone still had to carry __ to what is the world's rooftop.

In 2005, a Chinese team scaled Qomolangma and found that it was not as high as that, as they __ the height to be 8844. 43 meters. Scaling Qomolangma is no __ task. The average air temperature there is -29 degrees Celsius, even four degrees_____ than in Antarctica. The snow there is 4 —5 meters thick and hurricane-like __ blow all the time. Team members were training to __the extreme conditions.

In a nutshell, measuring the Qomolangma's height is a tall order, __ huge amounts of money and human resources, But it is worth the_____. Qomolangma is the perfect __ for observing crustal （地壳的）movements. And changes to the peak's height could __ whether the two plates are heading toward or away from each other.

Besides, the condition of snow and other natural materials at the top is an indicator of upcoming climate change on the Tibet-Qinghai Plateau. That's __ measuring the Qomolangma's height is so significant. Put to good use, it can benefit mankind.

5 . On Easter Day 1722, some European explorers found a lonely island in the middle of the Pacific Ocean. They _______ it Easter Island. The explorers found that the island had good soil _________ the 200 natives living there survived with little food. Even more _________, these people also lived among the ruins of what might have been a once great civilization. All that is left of it are around 800 giant stone statues _________ human heads. They _________ up to 270 tons and the tallest measures over 11 metres. The stone men face_________ rather than out to sea, and their eyes are focused upon the sky. They are all carved from _________ volcanic rock(火山岩) and some have hats on their heads and eyes made from white coral. Since their _________ these huge stone men _________ one of the greatest mysteries of all time. Who built them? Why did they do it? Some experts believe the stone men are __________ to Inca stonework, and suggest the figures were created by people of Peruvian descent(血统). __________ have even gone so far as to say that they came from outer space. The latest suggestion __________ the idea that Easter Island represents one of the worst cases of resource abuse in human history. It is said that a small group of Asians settled on Easter Island __________ between 400 and 700 AD. They developed a great civilization with huge forests and __________ food. At the peak, of their civilization, the people began to build the giant __________ men. Why they did this is still __________ but it is possible the figures represent the settlers’ gods or ancestors. __________ the statues grew larger, the people’s lifestyles became more and more wasteful. The forest began to disappear, which __________ all the animals dying out. __________ couldn’t get food and were forced to eat other humans. Society began to __________ and the islanders themselves finally destroyed the stone men.

6 . Now elsewhere in the world, Iceland may be spoken of, somewhat breathlessly, as western Europe's last pristine wilderness. But the truth is, once you're off the ______ track of the low-lying coastal areas where everyone lives, the roads are few, and they're all bad, ______ Iceland's natural wonders have been out of reach and unknown even to its own ________For them the land has always just been there, something that had to be dealt with and, if possible, _______—the mind-set being one of land as commodity rather than land as, well, priceless art on the scale of the " Mona Lisa".

When the opportunity arose in 2003 for the national power company to enter into a 40-year ______ with the American aluminum company Alcoa to supply hydroelectric power for a new smelter （冶炼厂）, those who had been dreaming of something like this for decades ______ the opportunity. For a long time, life here had meant little more than a hut, dark all winter, cold, no hope, children dying left and right, plagues, starvation, volcanoes erupting and destroying all vegetation and livestock, all spirit— a world ______ almost entirely around the welfare of one's sheep and, later, on how good the cod catch was. In the outlying regions, it still largely does.

Ostensibly, the Alcoa project was intended to save one of these dying regions— the remote and sparsely populated east— where the way of life had steadily ______ to a point of desperation and gloom. After fishing quotas (定额) were ______ in the early 1980s to protect fish stocks, many individual boat owners sold their allotments or gave them away, fishing rights ended up mostly in the hands of a few companies and small fishermen were virtually ______. Technological advances drained away even more jobs previously done by human hands, and the people were seeing everything they had worked for all their lives turn out to be ______ and their children move away. With the old way of life doomed, aluminum projects like this one had come to be perceived, wisely or not, as a last chance. "Smelter or death."

The contract with Alcoa would infuse the region with foreign ______, an estimated 400 jobs, and spin-off service industries. It also was a way for Iceland to develop expertise that ______ could be sold to the rest of the world and ______ an economy historically dependent on fish. “We have to live,” Halldor Asgrimsson said. Halldor, a former prime minister and longtime member of parliament from the region, was a driving ______ behind the project. “We have a right to live.”

7 . Every year about 40,000 people attempt to climb Kilimanjaro, the highest mountain in Africa. They _______ with them lots of waste. The _______ might damage the beauty of the place. The glaciers(冰川) are disappearing, changing the _______ of Kilimanjaro.

Hearing these stories, I’m _______ about the place — other destinations are described as “purer” natural experiences.

However, I soon _______ that much has changed since the days of disturbing reports of _______ among tons of rubbish. I find a _______ mountain, with toilets at camps and along the paths. The environmental challenges are _______ but the efforts made by the Tanzania National Park Authority seem to be _______.

The best of a Kilimanjaro ________, in my opinion, isn’t reaching the top. Mountains are ________ as spiritual places by many cultures. This ________ is especially evident on Kilimanjaro as ________ go through five ecosystems(生态系统) in the space of a few kilometers. At the base is a rainforest. It ends abruptly at 3, 000 meters, ________ lands of low growing plants. Further up, the weather ________ — low clouds envelope the mountainsides, which are covered with thick grass. I ________ twelve shades of green from where I stand. Above 4, 000 meters is the highland ________: gravel(砾石), stones and rocks. ________ you climb into an arctic-like zone with ________ snow and the glaciers that may soon disappear.

Does Kilimanjaro ________ its reputation as a crowded mountain with lines of tourists ruining the atmosphere of peace? I found the opposite to be true.