My neighbor is a doctor. He and his wife are some of the1people I have ever met. A few years ago, we started this kind of "favor war" where one of us would do something kind for the other, such as2the driveway or building a shed, and next time the other would3to top it with another favor.

    Yesterday morning, it snowed heavily and I remembered he shoveled (铲) my driveway for me. So I took out my shovel and took care of both our driveways and sidewalks because it was my turn to do a favor4. It took a while but I finished it and got into my car for work.

That night I got a5on my door, it was my neighbor. He immediately shook my hands and thanked me for shoveling his driveway and sidewalk, so that he was able to get to work earlier and6a boy.

    "As soon as I started the car early this morning, a call came through that a young boy in our neighborhood was seriously ill.7, my partner and I were only about 2 minutes away, but the closest ambulance 10 minutes," added he. "A young boy got to live his life because you did me the favor."

    It wasn't too much8to shovel a driveway, but what I did got a young boy to see his family again, go back to school again and live his life again.9favor is too small. Even the smallest favor can make the biggest10. One favor will always be followed by another.

    Nowadays we can see more and more electric bikes in the street. Electric bikes 61. {#blank#}1{#/blank#} (be) easy to ride. They run fast and make no {#blank#}2{#/blank#} (pollute). They become very popular, {#blank#}3{#/blank#}the electric bikes also cause more traffic accidents. So China plans {#blank#}4{#/blank#} (make) a new rule for the electric bike riders. If an electric bike is {#blank#}5{#/blank#} (heavy) than 40 kilos and can go faster than 20 kilometers an hour, its rider must get a license. It means some riders have to pass driving tests before they ride {#blank#}6{#/blank#} (them) electric bikes on the road.

    People have different ideas after {#blank#}7{#/blank#} (hear) the plan. Some welcome the plan. A bus driver said happily, " {#blank#}8{#/blank#}a good plan! I think it will make the street much safer." Some are not happy with the new rules at all. One rider said {#blank#}9{#/blank#} (sad), "I don't want to get a license. It's not convenient {#blank#}10{#/blank#}me to get one." Some don't care about it. A young rider said calmly, "I prefer to use shared bikes which are popular in many big cities of China now. I hope they can come to Loudi earlier!"

    It was the summer before my third grade. Our girls' softball team was facing real pitchers (投球手)1the first time. Before that, we could just hit the ball on the tee (球座). When the coach started pitching, hitting became2for me. I missed every single pitch. From the side, I heard my teammate Emily laughing at3. My face got hot and my throat felt like it had a softball stuck in. At that moment, I was starting to4playing softball.

    The next afternoon, when Mum said it was time to play the game, I told her I was5. She allowed me to lie down for a while. So I went to my room and6myself in bed. This was difficult for me because I was fine and just7to avoid softball.

    Soon Mum came in and said, "Time to go!" She didn't even ask if I felt8. I imagined Emily laughing from the sideline, and9I really did feel sick to my stomach. I began crying loudly. Still, Mum pulled my team T-shirt over my head. She said, "You have to10for the rest of the season, and only after that we can talk about 11you'll continue next year." She added that practice was what I needed, not12. She promised to practise with me.

    I got two hits that afternoon, and Emily didn't make a13. Every week after that, I practised at home14I got to be one of the best hitters on the team.

    That15taught me that being afraid is part of life, and I can do whatever is expected of me if I keep working and practising.

I went to Grand Canyon (大峡谷) National Park in July 2012 for the first time and I knew I wanted to work there as a park ranger（管理员）. Park rangers protect the park's animals, plants, land, buildings, and people.

Now, as a park ranger for Grand Canyon National Park, I share the science, history and beauty of this park with thousands of visitors from around the world.

National parks are like outdoor museums. Park rangers have all kinds of jobs, depending on where they work and what they studied during college. I teach school field trips（实地考察）, work at visitor centers and help people stay safe during their visit.

My favorite part of my job is showing children their first look at the Grand Canyon during school field trips. Children are often amazed at the canyon's size and colors. Sometimes, they think it looks like a painting.

Being a park ranger requires a lot of energy. I walk several miles and talk with hundreds of people each day. Park rangers must enjoy working with people and speaking in front of groups. Nearly 5 million people visit Grand Canyon National Park every year.

Park rangers must also be prepared for any situation. Recently, I broke a traffic jam(堵塞). It was caused by a huge elk（麋鹿）standing in the road. Elks can become dangerous when they get scared, so I asked visitors to stop their cars and take pictures from far away. Believe it or not, I also help protect people from monkeys. It is not allowed to feed animals in national parks. But sometimes, visitors try to feed monkeys.

    My name is Philippe and my wife's name is Sophie. We're from1. Recently we were faced with a 2situation while traveling by car in the mountains with our hired driver. Just as we began to doze(打盹), the car made a strange, loud noise and then3working.

    We tried communicating with the driver but with little4because he couldn't speak French. He tried to tell us with body language that he was going to get help and then he left.

    We were in a poor area, with 5houses in sight. We started to bear the cries of wild animals Sophie was very afraid. We didn't have much food and it was getting 6and darker I began to lose7. Should we leave the car? Would our driver ever8? Was he a trustworthy man? We were very worried.

A couple of hours passed. 9, the headlights from another car appeared in the dark. A man got out of the car. Finding us cold and hungry, he kindly asked us to10his car.

11we left, he put a note on the windshield of the car with his phone number on it. Then he drove us to a nearby village, and we met his family. His cousin spoke French and he 12us tea and local foods. 13asked us questions and they were excited to have unexpected guests.

    Later that evening, the phone rang. It was our14. He had kept his word and fixed the car.

    I will15forget the warmth we received on that day because we depended on a complete stranger for help.

Nature is amazing! Take a close look at the world of insects, and you'll discover many unbelievable things. Consider butterflies (蝴蝶), for example. They have beautiful wings and magical flying skills. On summer days, you always see them flying freely over flower gardens and wild fields.

But did you know how butterflies become the flying insects? It is one of the wonders of nature. In the beginning, the mother lays a small and colourful egg on a leaf or stem of a plant. It is hard to believe that the egg will become something completely different in a few days. It becomes a walking insect. This insect is called a caterpillar. It now has legs, eyes and a large body. A new life begins. The caterpillar can eat, walk and see. But it is still not a butterfly.

Soon, after growing big, the caterpillar makes a cover for itself. It covers itself in the nice protective blanket (保护层) and goes to sleep. This is known as the "pupa (蛹)" stage. After some time, the blanket breaks and a wet butterfly appears. It now has six legs, a mouth, eyes and wings. Shortly, the beautiful butterfly spreads (张开) its wings and flies away. After a few weeks, this butterfly lays her eggs, and the cycle (循环) begins all over again.

This is just one example of the wonders of nature. Look around the natural world, and you will learn many truly amazing things.