Dear Student of Star Middle School:

    As your student council president, I am writing to ask for your support to start the Count-Your-Steps walking program. Mr. Stewart Thomas, a parent of two students at Star Middle School, firstly came up with the idea. Mr. Thomas is a fan of walking and wants to encourage others to appreciate the activity. He shared his idea with our principal, Ms. Howser, who immediately agreed that we should try it.

    Ms. Howser contacted the other middle schools in the district, and all the teachers eagerly adopted the program. Now a team of Count-Your-Steps organizers made up of representatives from the middle schools, has established the program's goal: to increase awareness of the benefits of walking. Organizers want middle school students to accept this challenge and make walking one of their daily activities.

    The program has clear guidelines. Interested participants must only commit to recording the number of steps taken daily. Ms. Earley, the assistant principal, will give each of us a log for recording our steps and a pedometer, which is a small, digital tool used to count the steps of the person wearing it. All participants need to do each day is to wear the pedometer, walk as much as possible, and then record the number of steps in our logs. Clearly, the process is simple and convenient.

    While the benefits of walking are multiple, this challenge offers all who participate the opportunity to work together, achieve success, and make positive changes. Remember that the other schools in the district are signed up for the Count-Your-Steps too, and each one will try to take more steps than our school. I hope many will agree to this challenge and show everyone the Star Middle School Cougar Spirit.

    Please take into careful consideration this valuable and well-planned program, and then sign up today! In the words of Mr. Thomas, “Together we can enjoy the advantages of walking.”

    Sincerely,

    Cora Jeffries

    The eyes are the windows of the soul (心灵) . Having a pair of bright, clear eyes is very important, so we should protect our eyes throughout our lives.

    {#blank#}1{#/blank#} Don't read while lying down or walking. Relax after every hour of reading.

    Keep a distance from the TV set when you watch TV and give your eyes a rest every 30 minutes.

    Don't stare at (盯着看) the sun or try to read in the darkness. {#blank#}2{#/blank#} This can damage your eyes easily.

    Get your eyes checked often. Not many people have this habit, but it is necessary. If you feel that there is something wrong with your eyes, get them checked quickly. {#blank#}3{#/blank#}.

    {#blank#}4{#/blank#}. You can close your eyes for a few seconds or look into the distance for one or two minutes. A small break will relax your eyes and help to stop you from getting eye problems.

    Be careful when you choose your glasses.{#blank#}5{#/blank#}. Make sure your glasses are right for you. If they don't feel right, get your glasses changed.

A. Develop good reading habits.

B. Rest your eyes whenever you can.

C. Make sure you get enough sleep every night.

D. Glasses that aren't suitable for you could bring you trouble.

E. Even if you're wearing sunglasses, never look directly at the sun.

F. Eye problem can be found and treated early with regular checks.

G. Drink green tea every day as a way to protect your eyes against eye problems.

    Elephants might be the most well-known and well-loved animal in African wildlife. But conservation (保护) of the African elephant still faces special difficulties. While the elephant population is half of what it was 40 years ago, some areas of Africa have more elephants than populated areas can support. That's why AWF scientists are studying elephant behavior, protecting habitats and finding ways for humans to live peacefully with elephants in Africa.

    Years ago, overhunting and the ivory trade were the biggest threats to elephants' survival. Luckily, ivory bans (禁令), hunting rules and protected areas protect elephants from these dangers today.

    The 21st century brings a different challenge to elephant conservation—land-use. Elephants walk across borders and outside parks and other protected areas. So they often destroy crops, causing conflicts (冲突) between local farmers and these big animals.

    Successful conservation strategies (策略) must allow elephants to walk freely in their natural habitats while reducing conflicts between elephants and local people.

    AWF researchers are searching for a way to give both elephants and people the space they need. The AWF is collecting information on elephant habitats and behavior. The information they gather will help to develop the widest possible space for elephants.

    The AWF is helping elephants by protecting their habitats. And they also work with local famers to improve their life in order to encourage them to protect rather than destroy elephants.

    Humans make mistakes. Even surgeons with years of experience are not infallible. But what if these doctors could pool their knowledge and experience together and create a surgical standard of care, to be carried out by machines?

    That's the idea behind surgical robots, which may soon perform most surgeries, from sewing up tiny wounds to performing heart procedures. Many of these operations are, in fact, already completed with the assistance of robots. But a recent test suggests that robots in the operating room may soon go a step further, performing on soft tissue completely on their own, from start to finish.

    The Smart Tissue Autonomous Robot（STAR）, successfully completed surgeries on pigs. "We're the first group to develop autonomous robotic surgery with soft-tissue surgery, and when compared to standard operation, it's better, "says Peter Kim, professor of surgery. "The idea is not to replace surgeons；it will make the surgeons better and make the procedures safer. "

    A recent Mayo Clinic study found that major surgical errors-including operating on the wrong site or side of the body, or even leaving tools or objects inside the patient-occur every one out of 22, 000 procedures. That's rare, but robots like STAR would aim to lower the number even further.

    In the da Vinci surgical system, surgeons place their arms inside instruments and use their hands to control the movement of robotic tools on the operating table from afar. The robot's every major move is controlled by surgeons, and thus its results may vary based on the surgeon's training or experience.

    STAR, on the other hand, is entirely autonomous. It's not only able to work on its own and perform surgeries with a more flexible "hand", but it's able to react to the unexpected incidents. Cutting into hard tissue like bones is one thing, but operating on moving soft tissue is far more complex. STAR reacts to a changing environment, similar to how self-driving cars are programmed to not only drive on the highway, but also react to another driver making a mistake and getting in your way.

    I'll never forget the day when Mary came into my office and said, I am too old to learn how to use a computer. I shook my head. Here was a woman who had raised 6 children and who had made great progress in her career telling me that she was too old to learn something new. I told her that I always believed people were never too old to learn.

    Mary followed my advice and did learn how to use the computer. Now, she is retired and leading a very active life volunteering in her community(社区), using her computer skills and helping anyone that needs help.

    When she was in her sixties, one day she called me and said she had played the piano for others all her life, and now she was going to plan to make a CD of her own. My mind flashed back to the day when she told me she was too old to learn. You can imagine my surprise and delight.

    To produce the CD, she had a lot of things to learn. It was not just sitting at the piano and playing. She had to research the songs, learn about copyright(版权), and learn about marketing. It was pretty amazing for someone who once said she was too old to learn. And finally she made it. Now she has her own CD-Mixed Blessings.

    Most of you probably have heard about some people who have gone back to university in their seventies and have also graduated. They are on their way again to charging themselves with a new skill and a new attitude towards life. The point is you are unable to learn anything at any age if you believe you are too old. On the contrary, you can achieve anything at any age if you believe you can.

In a small town, there was a young man named Tom. Although he was just a(n) 1 person, Tom had a very kind heart and a strong sense of 2 . The town had a serious shortage of clean water. This problem had a big influence on the 3 . It messed up their usual activities and was a big threat to their health.

Tom, decided to do something. He spent a lot of time, working day and night to find possible solutions. He 4 different organizations and asked for their help. Many people around him thought it was a 5 thing and told him to stop. But Tom was very firm in his decision and always positive.

He 6 a group of people and they started a 7 to make people know how important clean water is. They gave out flyers all over the town and even went to every house to 8 the situation. Their efforts slowly started to work. People from all 9 of jobs in the town were 10 by their hard work and began to offer their help and resources.

With the efforts of the whole community, a new water 11 system was finally put in. The town now had clean and 12 water. Tom's action not only solved the water problem but also made the people closer to each other. It 13 that even an ordinary person can make a big difference in 14 if they are 15 and have a positive attitude.