2 . Here is a story about a young boy in New York. He once went to one of Dr. Jane Goodall’s talks and learned about the _______ expressions of chimpanzees.

When he saw a picture of a chimpanzee on a box of _______and it looked like the chimpanzee was grinning (咧嘴笑), the boy _______ from what he’d learned at Dr. Goodall’s talk that the chimpanzee’s look was actually one of _______.

The boy _______ to the cookie-maker asking to take the chimpanzee’s picture off the box. _______ receiving a letter back from the company, he saw the picture of the chimpanzee _______from the box within just a few months.

“I took _______,” the boy now says. “And the company changed.”   _______ it happened that the picture changed, the boy and his family   ________it was his doing.

As the story shows, young students have much more ________ to accomplish change than what   ________may believe. Moreover, students often achieve much more than they ever   ________ they will.

The story also ________us that small actions can have a big impact. We often tend to think about   ________ events like Clean and Green Week. Instead, a lot of small changes can make a(an)   ________. If hundreds or thousands of students   ________ their families to turn off the tap to save water, move the air-conditioning temperature up a degree or two, drive less and make other environmentally friendly changes, the ________ family may change its behaviors.       

With these small yet highly   ________ changes, students have an effect beyond just their own actions. Students can   ________ by realizing that their own actions have more power than they may expect, and environmentalists can benefit as well by taking the time to focus on even the youngest students.

3 . Compean was no stranger to Los Angeles National Forest. He’d hiked the park several times. But after hiking along a _________ path last April, the 45-year-old man was lost.

As dusk _________, with several hours of aimless walking, his concern _________ fear. With only a bottle of water and less than ten percent battery _________ on his cell phone, Compean was unprepared for anything more than the two-hour journey he’d planned.

Compean climbed to a higher _________, some 7, 000 feet above sea level, where he found at least one bar of _________. “Help. My phone is going to die. I’m lost, ” he texted a friend, with a photo _________, showing where he was. All Compean could do then was wait. The temperature was dropping _________. Dressed so little, he soon felt cold to the bone.

Sixty miles away in Ventura County, Ben Kuo was reading a tweet _________ the Los Angeles County Police Department, showing an image of a man’s legs. Kuo has an unusual hobby. “I have always loved __________ where photos were taken,” he says. He frequently tries to __________ where movie scenes or television shows were filmed. When he saw the image of Compean’s legs surrounded by an endless landscape of __________, he immediately pulled up a satellite map on his laptop. The police department said Compean’s car was parked near Buckhorn Campground and Compean had been lost for a whole day, so he narrowed his search to the __________ area.

“There’s an amazing amount of information you can get from satellites, ”says Kuo. The first thing he __________ in Compean’s photo was the special grass. After comparing it to the satellite map, Kuo realized something, “He’s got to be on the south side __________ there’s not really any green valley on the north side.” That finding __________ his search, leading him to an area that was similar to a part in the image. The final step was comparing the __________ photo with 3D images of the area from Google Earth. The locations __________!

Thanks to Kuo’s __________ information, Compean was finally rescued and he was grateful to Kuo, “I __________ you my life”.

4 . After a two-hour flight from Shanghai and an hour’s drive, I reached my destination: Jielingkou Village in Qinhuangdao City of Hebei Province, China. The tiny and ________ village is home to Shanhai Pass, where the Great Wall finally dives into the sea. During the Ming Dynasty (1368~1644), Jielingkou Village was considered an extremely important part of the Great Wall. But it slowly fell out of ________ and into disrepair—in modern China.

In 2018, an anti-poverty project began in the village, with the ________ of not only fixing the place up, but also ________ the living standards of the 200 people still living there. One of the ________ was to change all of the old homes into modern guesthouses. “This will allow city folks to enjoy the Great Wall in comfort,” said Ge, who was ________ the project.

But gaining the locals’ ________ took a lot of effort at the beginning. “Just two years ago, they weren’t ________ about the project at all,” Ge told me. “Seeing that they had to ________ water from a faraway well every day, we decided to build a water system that would send water to their homes. It’s one of the first, ________ we have made. It really ________ . Now some of those who were strongly against our project are now our greatest ________ .”

Ge said he hopes that as conditions are ________ becoming better in Jielingkou, some of the younger members of the village who left to seek opportunity in the cities will come back. “Already two university graduates who grew up in the village have returned to ________ the guesthouses. I hope more will be ________ by the potentials here soon.”

5 . Banff National Park is home to an amazing wildlife population. But the busy Trans Canada Highway that cuts through the park is a hazard to the lovely animals. To address the problem, Banff first put-up wildlife fencing on either side of the highway to discourage animals from entering the busy road. Then, since 1996, they’ve opened six wildlife overpasses and 38 underpasses to help the animals cross the highway in safety. I was fortunate to visit Banff’s Red Earth Overpass with Trevor Kinley, the project manager with Parks Canada. He told me that so far, they have documented 10, 000 safe animal crossings on this overpass alone. “ Some animals have learned how to use the crossings much more quickly than others. Black bears are the fastest learners, followed by deer. Wolves and lions take the longest to work out how to use them, ” Kinley said, laughing. “ But those animals that are slower to adapt are usually more capable and determined at figuring out the safest way to cross those overpasses and underpasses. ”

There is some criticism (批评) that channeling so much wildlife into a few bridges and tunnels is like making a trap for the animals, offering big animals an easy meal on either side. “ But research has shown that this is not the case, ” Kinley assured me. “ There are no more killings around the crossings than there are anywhere else in the park. ”

Walking over the Trans Canada and then walking underneath through one of the tunnels, I was amazed to see the fresh tracks of black bears, wolves, deer and many kinds of smaller animals. Somehow, all these animal footprints made me so happy, knowing that all this wildlife was passing safely under and over the longest road in Canada.

Hopefully, the success of the wildlife crossings in Banff will continue to inspire similar solutions around the world, where human pressure on wildlife continues to grow.

6 . Wu Ming, a young German born after 1995, is a big fan of Chinese culture. As he thought some diseases can’t be treated _______ with Western medicine, he decided to _______traditional Chinese medicine (TCM). In 2015, Wu came to Henan province, where a strong TCM culture can be _______. After a year of learning, he _______ the language barrier and started to learn Chinese medicine. Wu always _______ some Chinese herbal medicine by himself to know their flavours and effects, just like Shen Nong, a character in Chinese legend. In Wu’s opinion, TCM is one of the best-preserved _______ of Chinese culture.

Studying TCM also _______ Wu’s mind and lifestyle. He used to be _______ to electronic devices, playing video games every night. Instead of being trapped in the fast-paced but unhealthy daily _______, he now lives a(n) ________ and peaceful life, practicing good habits like drinking tea and reading.

Wu ________ what he has learned to help his family. He always provides his family members with some advice about staying fit after ________ their skin or tongues online. Over time, his family gradually began to understand his ________ for TCM.

Wu thinks there’s no big difference between China and Western countries. “________ comes from being out of touch”, said Wu. He plans to run a traditional Chinese clinic in Germany, which could serve as a(n) ________ between the two countries and publicize TCM and its culture.

9 . Cheating in sport is as old as sport itself. The athletes of ancient Greece used potions to strengthen themselves before a contest, and their modern counterparts have everything from anabolic steroids (类固醇) to growth hormones with which to_________their bodies. These days, however, such stimulants are_________, and those athletes must therefore face the challenges of anti-doping (反兴奋剂) agencies.

The agencies have had remarkable success. Testing for anabolic steroids was introduced in the 1970s, and the incidence of cheating seems to have_________dramatically as a result. The tests, however, are not entirely_________. And a study just published in the Journal of Clinical Endocrinology & Metabolism by Jenny Jakobsson Schulze and her colleagues at the Karolinska Institute in Sweden suggests that an individual’s genetic make-up could_________the tests in two different ways. One genotype, may allow athletes who use anabolic steroids to escape detection altogether. Another may actually be convicting (给……定罪) the innocent.

The test employed for testosterone (睾酮素) abuse usually relies on measuring the_________of two chemicals found in the urine (尿液): TG. and EG.. Any ratio above four of the former to the latter is considered_________and leads to more tests. However, the production of TG is controlled by a gene called UGT2B17. This gene comes in two varieties, one of which has a part missing and therefore does not work properly. A person may thus have none, one or two working copies of UGT2B17, since he inherits one copy from each parent. Dr. Schulze_________that different numbers of working copies would produce different test results. She therefore gave healthy male volunteers whose genes had been examined a single 360mg shot of testosterone — the standard dose for legal medical use — and checked their urine to see whether the shot could be_________.

The result was remarkable. Nearly half of the men who carried no functional copies of UGT2B17 would have gone undetected in the standard doping test.____________, 14% of those with two functional copies of the gene were over the detection threshold (门槛) before they had even received an injection. The researchers estimate this would give a ____________rate of 9% in a random population of young men.

Dr. Schulze also says there is substantial____________variation in UGT2B17 genotypes. Two-thirds of Asians have no functional copies of the gene which means they have a naturally____________ratio of TG to EG, compared with under a tenth of Caucasians (白种人) — something the anti-doping bodies may wish to take into account.

In the meantime, Dr. Schulz’s study does seem to offer innocents a way of____________themselves. Athletes who will travel to Paris for the Olympic games may be wise to travel armed not only with courage and the “spirit of Olympianism”, but also with a copy of their____________, just in case.

10 . It was an evening when my parents and I ventured across Nemeiben Lake, in Northern Saskatchewan. This _______ lake, which expanded 26 miles across, had a reputation as being the best fishing and tourist resort in the province.

The sun was _______ behind the dark rolling _______ and we set off. Soon the lake seemed to be deserted _______ the sky began to darken, looking much _______ in the darkness, which made me feel a little nervous.

And then suddenly the boat _______ something with such force that we all fell _______ in our seats. My father went to the back and found the water was now _______ in at a very fast rate.

The overloaded boat was now deep in water. The _______ was now to come. With our life jackets ________ , we waited as the boat sank deeper into the water. The biting cold was more terrifying than anyone could have ________ .

A strong wind blew ________ the lake and the strong waves carried us off into the night. I knew that ________ was near. Then suddenly, something quite ________ happened. A shadow appeared up ahead. I blinked in   ________ . A beautiful large diving-bird landed only feet from my grasp. It stayed calmly by my side and all of a sudden I didn’t feel ________ any more. Deep in my heart, I knew everything would be ________ .

When a fisherman found us the following ________ , our body temperatures were only twenty-four degrees after we had been in the water for 13 hours.

As I lay in the hospital bed ________ , I thanked God for all his mercy and for the guardian angel that ________ me. Anyway, that was an unforgettable experience.