Eric was a nine-year-old boy who lived with his single mother, Stacey and sister, Lily. They lived a hard life. Eric felt bad for their situation but worse for himself, especially in school.

Eric's leather boots were worn out. They didn't protect his feet from the rain, and his socks became totally wet as water went through the holes in his shoes. Stacey attempted to fix the holes but it was no use. Eric still walked to school with that pair of broken shoes. How much he wished he could also have new comfortable and expensive shoes his classmates wore!

One day, Eric returned from school and complained to Stacey, "It was raining today. Water has leaked into my shoes again. I hate my boots! Why can't you get me new ones?" Stacey was sad and helpless. "I spent our last savings on your sister's medicine. She's sick. Eric you know that. You need to act like a responsible big brother!" she answered. Tears welled up in Eric's eyes. "I hate you!" he shouted. "You only care about Lily! You don't love me!" Then he cried and ran to his room.

After preparing dinner, Stacey went to his room with his dinner plate. "I'm sorry, Eric," she whispered to comfort him. "We're going through a very tough journey recently. But I'll get you new shoes in the future." However, Eric refused to listen to her.

The next day, when Eric went to class, he took his seat quietly and hid his feet under his chair, as usual. He was embarrassed to show his boots. As the math teacher Mrs Fletcher entered the class, all the students greeted her. "Today, we have a very special friend with us," she smiled. "Everyone, please welcome Ben, your new classmate." Soon after, a boy with a pair of crutches(拐杖)entered. The new boy only had one leg. Eric was shocked. He and all his classmates thought how unlucky Ben was and that he must be very shy and sad.

注意：1.续写词数应为150左右;2.请按如下格式在答题卡的相应位置作答。

Paragraph 1: At that moment, Mrs Fletcher asked Ben to introduce himself. 

Paragraph 2: Inspired by Ben, Eric realized he should appreciate what he had. 

D

With the completion of the Human Genome（基因组）Project more than 20 years ago, and the discovery of the double helix structure of DNA enjoying its 70th birthday last year, you might assume that we know how life works. Think again!

Evolution has a 4bn-year head start on us. However, several aspects of the standard picture of how life works-the idea of the genome as a blueprint, of genes as instructions for building an organism, of proteins as precisely tailored molecular（分子）machines and more-have wildly reduced the complexity of life. 

In the excellent book How Life Works, Philip Ball explorers the new biology, revealing life to be a far richer, more delicate affair than we have understood. Ball explains that life is a system of many levels-genes, proteins, cells, tissues, and body modules-each with its own rules and principles, so there is no unique place to look for an answer to it. 

Also, How Life Works is a much more appealing title than the overused question of "What is life?". We should be less concerned with what a thing is, and rather more focused on what a thing does. Defining a living thing implies an unchangeable ideal type, but this will run counter to the Darwinian principle that living things are four-dimensional, ever changing in time as well as space.

But it's an idea that is deeply rooted within our culture. Ball points out that we rely on metaphors（比喻）to explain and explore the complexities of life, but none suffice. We are taught that cells are machines, though no machine we have invented behaves like the simplest cell; that DNA is a code or a blueprint, though it is neither; that the brain is a computer, though no computer behaves like a brain at all.

Ball is a terrific writer, pumping out books on incredibly diverse subjects. There's a wealth of well-researched information in here, and some details that are a bit chewy for the lay reader. But the book serves as an essential introduction on our never-ending quest to understand life.

Earlier this year Rodney Smith Jr. made headlines when he drove eight hours from his home in Huntsville. Alabama, to cut the lawn for an elderly soldier in North Carolina who couldn't find anyone to help him with his yard work.

That wasn't the first time the twenty-nine-year-old Bermuda native had gained such attention. To do his good deeds, Rodney often finds leads for those in need through social media.

Back to one August afternoon in 2015, Rodney Smith Jr. was driving home. That's when Rodney saw an elderly man struggling to mow his lawn. He would take a couple of shaky steps, using the handle to stabilize himself, pause, then slowly push the mower again. Rodney decided to help. Mr. Brown thanked him greatly, and Rodney went home feeling satisfied.

Sitting at his computer to do his homework, Rodney couldn't get Mr. Brown out of his mind. There must be many Mr. Browns out there. He went online and posted that he would mow lawns for free for senior citizens. Messages flooded in.

One day a cancer-battling woman said she wasn't having a good day. Rodney decided to do more than mowing lawns. After he finished mowing, he knocked on her door. "You're going to win this fight, Madam", he said. Then he asked folks to pray for her on social media.

Word of Rodney's mission spread. A grandmother in Ohio said he'd encouraged her 12-year-old grandson to mow lawns. He got a letter from a seven-year-old boy in Kansas. "Mr. Rodney, I would like to be a part of your program, and I'll make you proud," he wrote.

That gave Rodney an idea. In 2017, he decided to establish a programme Raising Men Lawn Care Service to make a national movement for young people. The kids learn the joy of giving back.

Yard work seems like a small, simple thing, but taking care of the lawn means a lot to the people they do it for. "When we mow their yards for free, they can use the money for healthcare and food etc. It means more than you would think," Rodney said.

Max Du won the Canada-Wide Science Fair. His project is a drone (无人机) to save people who go into cardiac (心脏的) arrest. Max got the inspiration during Christmas break last year. "I got a toy drone from my parents, but I couldn't fly it because it is snowy." Max said. "So I played with it at home, and it got me thinking how a drone could be used as an indoor robot that could help people."

About 35, 000 people have cardiac arrests in Canada each year. Most of those happen outside of a hospital, of whom fewer than 10 percent survive. Max believed a drone could offer faster support and life-saving medicine, but he had to build it himself to know for sure.

Testing his drone took about six months. Max's parents had to deal with their son's constantly flying and crashing in the home. Every time Max would create an exciting innovation, such as an extendable arm, it would add extra weight to his drone, causing it to break apart. Then Max would have to buy all new parts. Max tested using more lightweight materials until his design was more balanced.

Through trial and error, the 14-year-old boy finally got it right. His drone can open a door handle, fly in the air and then land softly on the ground. A new extendable arm can be released to administer a shot or hand a patient lifesaving medicine. A built-in camera could directly conference with an emergency response team whose members could monitor the patient remotely.

Max plans on applying for a patent (专利) so he can make connections in the health-care industry to get it made for real. He's spent his summer learning about artificial intelligence at California's Stanford University as one of 32 kids selected worldwide. He'll head next to the University of Pennsylvania to take a college-level robotics class before returning to high school in September.

Don't ignore (忽略) the difference teenagers can make.

John Michael Thomas, 14, Florida

When John Michael Thomas decided to honor his friend and classmate Elizabeth Buckley, who died from cancer, he remembered how much she loved peacocks (孔雀).

He wanted to build a life-sized peacock fountain (喷泉) in Elizabeth's favorite park in the city. He thought it could be a place for people to relax and be inspired.

John Michael raised $52,000 to build the fountain.

Barrett England, 13, Utah

The wheels began to turn for Barrett England when he heard about Karma Bike shop, a place where young people can earn free bikes by reading and performing community (社区) service.

Barrett visited Karma's owner with his idea: He would collect and repair used bikes and donate them to the shop.

He expected to get about 10 donated bikes. In the end, Barrett received 39.

Zachary Blohm, 15, Wisconsin

The 25-year-old playground at an elementary school near Milwaukee, Wis. was so small that only 70 of its 575 students could play on it at a time.

That's when Zachary Blohm saved the day. He and some volunteers wanted to build a huge playground. To raise money, Zac planned T-shirt and bake sales, sold tickets and more. He held monthly money-raising events for more than a year. Overall, he collected $130,000 — enough to finish his project.

Jack Zimmerman, 16, New Jersey

For some people, finding a meal is as simple as opening the refrigerator. For more than 366,000 hungry kids in New Jersey, it's not that easy.

That fact didn't sit well with Jack Zimmerman, who organized a drive to lessen childhood hunger in his state. His goal: create 40,000 packaged meals that could be donated to those in need.

On game day, Jack and his volunteers started their work. After the final count, the team had packaged 47, 124 meals—well above Jack's goal.

Year-12 student Noah Little has already sat his first Chinese-speaking exam and said it was "the easiest exam I've ever done". That view is not surprising given that the Wagga Wagga High School student loves language—so much that he has built a Chinese translation app.

Noah said his love of language was encouraged by his community. "Wagga Wagga is a place full of people from different cultures, and sometimes when I meet new people who have trouble speaking English, I like to talk to them in their own language," he said. "I also have a few Chinese friends so I think it will be cool to talk to them in their language."

The 17-year-old started teaching himself Chinese around five years ago, before taking distance education courses at the start of Year 11. His language ability was also useful in his part-time job at a local Chinese restaurant, where he translated orders for the cooks and customers.

Noah said he also had a basic knowledge of seven other languages. It was while teaching himself the languages that Noah got the idea of the translation tool. "I decided to make my own app because there weren't many around—all the other apps were full of advertisements (广告) and the translation feature (专题节目) wasn't powerful enough," he said.

His app also includes a word of the day feature, lessons on how to write Chinese characters (汉字) and a news feed of important Chinese news.

He said learning computer programming to build the app had been like studying another language. With the end of school around the corner, Noah said he would like to pursue (追求) both his interest in computer programming and languages. "I'm planning to work for a year and save so I can go on to university as I really want to make a career (事业) out of one of these two topics."