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1、Sometimes there are hidden patterns in numbers you might not immediately notice. One example of this is in barcodes (条形码), the sequences (序列) of digits we use to identify products. Try it yourself — find an object with a 13-digit barcode. Books won't work, since they use a slightly different system, but magazines do, so you can use a copy of New Scientist. Add together the first, third, and fifth digits and so on, to get the sum of the odd-numbered digits; then, add up the even digits. If you triple (使成为三倍) the even sum, and then add it to the original odd sum, the total should be a multiple of 10, ending in 0.

This isn't just by chance: a barcode contains a checksum to make sure it is read correctly. Most of the digits are there to communicate information. The first two numbers show the country. The next 10 digits are more specific information about the product and who produced it. The purpose of the final digit is to detect errors or changes in the data, such as entering one digit incorrectly. This would give a checksum that isn't a multiple of 10, allowing us to catch the error.

All kinds of systems have checksums: ISBNs on books, which use a similar system based on multiples of 11; UK driver's license numbers, which have two extra check digits at the end; and credit card numbers, meaning a website can tell you have entered it incorrectly before even checking with your bank. They all use variations of the same system, performing a simple calculation with the digits that confirms the number is correct.

It won't eradicate all errors — for barcodes, there is still a 1 in 10 chance the checksum will come out as a multiple of 10 even if there is an error — but it greatly reduces them. It also doesn't tell you what the error is, so all you can do is try again. But it saves time that would otherwise be wasted trying to process incorrect numbers, and it is a clever use of math that makes the whole system work better.

2、On a bright, sunny day along the Crooked River in central Oregon, kids are fishing. But what's happening in that river runs much deeper than catching a fish — exactly what Chad Brown was hoping for when he started Soul River. The Portland-based non-profit offers an escape into nature for kids who might not otherwise have the opportunity.

Chad had been in a bad car accident. Since then, he's been dealing with post-traumatic stress disorder (PTSD), trying to escape the anxiety and nightmares. "I seemed to be lifeless. I couldn't feel the air. I couldn't feel the grass. I couldn't smile," he said. But when a friend took him fishing, he regained energy and life. "That brought me into the present where I could actually feel the air, feel the currents, that I'm standing in water... It made me feel alive."

It was a turning point in Chad's life. Drawing on the strength he found in nature, Chad discovered his life's purpose and founded Soul River to share the healing power of nature, rivers, and fishing with at-risk inner-city youth.

In the process of enjoying nature, Chad realized that nature itself also needs to be protected, so he developed a program that takes youth into an environment where fresh water, land, wildlife, or local cultures are threatened. He works with conservation groups and Native American communities to determine which areas could use their attention and advocacy. Often, the locations are remote and extreme.

The goals of the program are layered. For the youth, it's an opportunity to learn about leadership, relationship-building, and being integral to a community. Then, there's a conservation and advocacy component, where the group learns about the environment they're taken into, the specific threats it faces, and how they can be a force for good. The experience can help them find their own "Soul River" — their purpose, passion, their connection to the outdoors and to each other.

For Chad, it's a busy, nonstop cycle of planning, preparation, meetings, advocacy, and so on.

3、With the development of camping at home and abroad, more and more people have strong interest in camping. Camping provides outdoor lovers with the relaxation of the mind and inner peace. Here are some common ways to camp.

Tent Camping

This is the most basic and common way of camping. You can put up a tent in a park, on the beach, in the woods, or anywhere else you like, enjoying a few nights. Tent camping is a great choice for people who don't want to spend a lot of money to get started. It is perfect for families with children because it creates a special time for parents and kids.

Hiking Camping

Hiking camping, backpacking trip, means an outdoor camp, where you will spend the whole day hiking with necessary equipment on your back. It can last anywhere from a few days to several months. It gives you the chance to get closer to nature. In case of an emergency(紧急情况), you'd better share your travel plans with someone.

Survival Camping

In this type of camping, a variety of skills are required to learn in order to survive in various outdoor conditions. You will search for food on your own in the wild and take emergency medical measures in the event of danger. It would be a good idea to have a partner with a wealth of experience in the wild.

RV Camping

If you go camping in a motorhome, you will have more time to enjoy the outdoors. With a motorhome, you have almost everything at home, including comfortable beds, kitchens and entertainment. All you need is to find a suitable parking lot where you can park your car. You can also cook and enjoy food in the car and it will feel great. However, this is not recommended for starters.

4、假如你是李华，你的英国笔友Bill发来邮件关心你的学校生活。请给他回一封邮件，内容包括：

1. 你对新学校的印象；2. 你在高中的学习情况；3. 询问他的建议。

注意：1. 词数80字左右；2. 可适当增加细节，不能出现个人信息。

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5、If you don't know the exact meaning of the word, you may r to (参考) your dictionary. (根据中英文提示拼写单词)

6、With your great help, I am sure I will i(改进) my pronunciation and become more confident. (根据中英文提示拼写单词)

7、There are more and more new Internet platforms for us to e(交流) information. (根据中英文提示拼写单词)

8、However serious a problem you may meet, you should face the c(挑战) bravely. （根据中英文提示拼写单词）

9、We can hire bikes for a day to e(探索) the town. （根据中英文提示拼写单词）

10、New York is filled with people from d (各种不同的) parts of world. (根据中英文提示填空)

11、One good way to improve our spoken English is to take every o (机会) to communicate with others. (根据中英文提示拼写单词)

12、In order to enrich our c (校园) life the students' union has organised a concert. (根据中英文提示拼写单词)

13、Undoubtedly, more and more people are experiencing mental p (压力) in our life. (根据中英文提示拼写单词)

14、If you are trapped in an elevator, you should stay c (镇静的) and call for help. (根据中英文提示拼写单词)

15、阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

I began my journey studying in China in March 20l6, when I came to Beijing Language and Culture University (BLCU) to get my bachelor's degree in Chinese language. a youth from the USA, I feel that (study) in China is one of the best ways to understand this amazing country. Having studied at BLCU, I have the chance not only (interact) with international students from all over the world but to make friends with local Chinese students.

Through various activities, I was able to develop many friendships with Chinese students. It was through these friendships that I had the opportunity to better understand what the university life of ordinary Chinese student was like. Because many Chinese friends (come) from different areas around the country, I was able to gain a (good) understanding of China than before.

Besides the activities, my (favorite) were the times when my close friends from school would gather in my dorm room to cook and eat. It may sound like nothing special, these were some of my cherished (珍爱的) memories at BLCU.

I (true) hope that more foreigners in China can take advantage of (they) time to experience the food, the culture, and especially the people.

16、​​​​​​​Many students wonder how to study well in high school. Here are some good skills for you.

If you want to do well at school, going to class is the first step in studying well. If you miss classes, you will miss what the teacher thinks is important; as a result, you'll miss what is the most likely to end up on the test. So if you want to study well, go to every class.

Take good notes.

Try not to write down everything. Write down unfamiliar terms. After class, review your notes as soon as possible, you can fill in details that you missed and review the material while it is still fresh on your mind.

Talk to your teacher if you need help.

If you are struggling in class, talk to your teacher. They may tutor you before or after class. Most teachers will offer advice to the students who turn to them.

Take part in class discussions.

In order to learn more in class, it is helpful to take part in class discussions. Asking questions and having eye contact with your teachers and classmates can increase your participation (参与) and your focus during the class discussions. If the material is difficult, you'd better read it before class.

Form study groups.

Make sure that everyone is familiar with the material because you do not want to spend time re-reading material to people who do not understand it. Be careful! Sometimes group sessions can become chatting sessions.

A. Go to class.

B. They can help you.

C. Don't be late for your class.

D. You should write down all the new terms.

E. This helps you make your point clear in class.

F. Get students together who want to do well in class.

G. All you need is to put the main points in your own words.

17、This summer my mom and I did something meaningful and interesting.

Because of the stresses of high school, I felt depressed from time to time. What's worse, I began to eat many junk foods. As a result, I had gained a lot of weight.

My mom decided to take me to work out, and she cooked delicious but healthy snacks for me. However, I broke my word to my mom not to buy high calorie snacks. My mom found my snack wrappers in the garbage. She got really angry and told me something I will remember forever. She said, " My dear, I can forget the fact that you cheated, but you shouldn't. Remember it's not all about losing weight but about your whole life. If you want to achieve something, take it seriously, and persist（坚持）no matter what happens."

Since then, we have been out running each morning, and we do some yoga in the evening. We sing and laugh while running along the empty roads. Day by day, I am feeling better. Exercise is helping to strengthen my body and refresh my spirits. At the same time, my mom and I cook different dishes together. Isn't it amazing that I'm making such tasty-looking foods myself? Cooking brings great joy to me.

These times with my mom have changed my whole attitude to life. I have started to learn the importance of sticking to goals and how to relax. As the famous Brazilian soccer player Pele said, "With strong will, the feet are equal to a pair of wings."

18、Here is a great way for you to explore the beautiful countryside and colorful Chinese minority culture of southeast Guizhou during three days. With this 3-day Guizhou tour, you can appreciate the amazing wooden architecture of the Dong ethnic minority, discover a mysterious branch of the Miao ethnic minority, hike among the terraced fields, dress up in the traditional dress of the Dong people, and try their special tasty food. Here is a suggested plan of a journey.

DAY 1 Arrive in Zhaoxing Dong Village

Meet your personal guide at Congjiang train station. Drive to Zhaoxing Dong Village (about 10 minutes). Explore beautiful Zhaoxing Village in the afternoon. Your guide will walk around with you, explaining the style of the Dong wooden buildings, local customs, and the Dong people's lifestyle. And the Dong people's dancing and singing evening show is very enjoyable.

DAY 2 Zhaoxing Rice Terraced Fields Hike and Villages

Drive to Huanggang Dong Village in the morning. On the way, you will stop to hike around the terraced fields. Enjoy great views of the rice terraces and the villages on the mountain slopes (山坡).

Explore peaceful Huanggang Village and Zhanli Village, where you will see more of the authentic culture of the Dong.

Visit Biasha Miao village in the afternoon. Enjoy their traditional dancing and their ceremony with guns.

DAY 3 Zhaoxing Departure (离开)

Visit a batik (蜡染) workshop in the morning. Learn and experience making batik in the Dong style. Make a unique souvenir on your own (with guidance).

Transfer to Congjiang Train Station for your departure.

19、阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。

Ethan had always been known as the "piano guy" in his small town. From the age of seven, his fingers danced across the ivory keys, filling his home with melodies that echoed off the walls. Music was his voice, his comfort, his identity. However, everything changed when his family moved to a bustling metropolis during his senior year. Here, in a massive high school with thousands of students, Ethan became just another face in the crowd.

The first few months were brutal. In his old school, he was a big fish in a small pond. Here, he was invisible. During lunch, he sat alone, picking at his food while conversations swirled around him like a foreign language. He watched groups of friends laugh and share secrets, feeling a profound sense of loneliness. He stopped playing the piano altogether. The grand piano in his new apartment's living room remained untouched, a silent monument to a life he felt he had lost. He threw himself into textbooks, believing that academic perfection was his only path to recognition. But the silence inside him grew louder each day.

One Friday afternoon, Ethan was packing his bag, eager to escape the crowded hallway. Suddenly, a gentle hand on his shoulder stopped him. He turned to see Mrs. Laurent, the silver-haired music teacher, her eyes twinkling behind her glasses. "Ethan, I've been reviewing your transfer record," she said, her voice soft but firm. "It says here you're a pianist. The annual school talent show is next month." Ethan felt his cheeks flush. He shook his head, muttering an excuse about being too busy with schoolwork. Mrs. Laurent didn't look disappointed. Instead, she smiled knowingly. "Music isn't just about performing for others, Ethan. Sometimes, it's about finding the parts of yourself you've forgotten." She handed him a flyer for the talent show and walked away, leaving the words hanging in the air like a lingering note.

That night, Ethan lay in bed, Mrs. Laurent's words echoing in his mind. He thought about the dusty piano in the corner of the living room. A wave of longing, mixed with fear, washed over him.

注意：

(1) 续写词数应为 150 个左右;

(2) 请按如下格式在答题卡的相应位置作答。

Paragraph 1: The next evening, drawn by an irresistible force, Ethan lifted the keyboard cover of the piano. ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Paragraph 2: On the night of the talent show, as he walked off the stage amidst thunderous applause, Ethan saw Mrs. Laurent waiting in the wings. ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

20、假定你是李华，上周你和班级同学参加了学校组织的户外拓展训练（outdoor development training），如：rope climbing; team relay races等。请给你的英国网友Johnson写一封电子邮件，描述此次活动并谈谈你的感受。内容要点：

1.简述活动的主要过程;

2.分享你的个人感受。

注意：(1) 词数应为80个左右;

            (2) 请按如下格式在答题卡的相应位置作答。

Dear Johnson,

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Yours,

Li Hua