In choosing a friend, one should be very careful. A good friend can help you study. You can have fun together and make each other happy. Sometimes you will meet fair­weather friends. They will be with you as long as you have money or luck，but when you are down, they will run away. How do I know when I have found a good friend? I look for certain qualities of character，especially understanding, honesty and reliability(信任)．

    Above all else, I look for understanding in a friend. A good friend tries to understand how another person is feeling. He is not quick to judge. Instead, he tries to learn from others. He puts himself in the other person's place, and he tries to think of ways to be helpful. He is also a good listener.

    At the same time, however, a good friend is honest. He does not look for faults in others. He notices their good points. In short, a friend will try to understand me and accept me.

    Another quality of a friend is reliability. I can always depend on a good friend. If he tells me he will meet me somewhere at a certain time, I can be sure that he will be there. If I need a favor，he will do his best to help me. If I am in trouble, he will not run away from me.

    There is a fourth quality that makes a friend special. A special friend is someone with whom we can have fun. We should enjoy our lives, and we would enjoy our friendship. That is why I especially like friends who are fun to be with. A good friend likes the same things I like. We share experience and learn from each other. A good friend has a good sense of humor too. He likes to laugh with me. That is how we share in the joy of being friends. And I know that he is looking for the same quality in me.

    When I meet someone who is reliable, honest, and understanding，I know I've found a friend!

    On a Sunday morning, I was driving down a road and saw something I couldn't believe. A little girl, less than two, was pushing her stroller (婴儿车) across the road. It was Sunday morning and traffic was not heavy.

    I stopped my car at once and ran toward her. This little girl knew enough to run from a stranger. I tried to catch her in order that I could get her out of the road.

    Suddenly her father came running down a hill across the road from where I had parked my car. He ran right to her and caught her up, saying “bad girl” to her. I picked up the stroller and gave it to him. The father grabbed the stroller and walked toward where he came from without a word.

    I went back and sat in my car for a few minutes with my son. My hands were shaking and tears were about to run out of my eyes. “Do you feel cold, Mom?” asked my son. I just shook my head.

    After this happened, I thought about how thankful I am. Even though the father didn't say thank you, I feel that I did something good. Doing something for someone else is pleasing, even when it's only a matter of being in the right place at the right time.

    I didn't really “save” her, but I feel like it was important that I happened to be there. It is sad that I was the only one who stopped. It really made me a little disappointed that no one else stopped to help.

阅读下列短文，从每题所给的四个选项 （A 、B 、C  和 D ）中，选出最佳选项。

    Christmastime in the city brings forests of trees already cut and waiting to be sold. But some people like to drive to tree farms. Others wait for their trees to come to them. They order one from the pages of a catalog or on the Internet. Some say the easiest thing of all is to buy a man­made tree with Christmas lights already on it. No falling needles to have to clean up.

    The National Christmas Tree Association says 33,000,000 real trees were sold last year, compared to 9,000,000 man­made ones. Man­made trees generally cost more, but they can be reused. Most natural trees are cut up and recycled, but some people buy trees that can be planted.

    Most Christmas trees are now grown on farms instead of in forests. Twenty-one thousand tree farmers in the United States grow Christmas trees on more than 180,000 hectares. Oregon was the leading producer last year.

    Twenty-two percent of people who bought real trees last year chose them at a farm. Two percent of those people cut the trees themselves. The next most popular places were big stores like Walmart and Home Depot. Groups like the Boy Scouts also sell Christmas trees. But some people pay nothing for theirs. They steal it.

    Cornell University in Ithaca, New York, has many pretty evergreens. Some years ago, a university worker found a way to keep them there. A month before Christmas, workers treated them with “pink ugly mix”. It contains water and red food colour. The bright colour starts to disappear after about a month. It can take longer, however. Cornell decided not to use the mix this year, but the idea has spread.

    On April 2, we said goodbye to Tiangong I, China's first space lab. According to the China Manned Space Agency（中国载人航天）, Tiangong I re-entered the Earth's atmosphere （大气层）and fell into the South Pacific Ocean.

    There are many spacecraft that are still in orbit above the Earth. They are flying at heights ranging from 300 to 1,000 kilometers. After finishing their trips, they will all re-enter the Earth's atmosphere like Tiangong I.

    There are two types of re-entries：controlled（受控的）re-entry and uncontrolled re-entry.

    Some satellites（卫星）and manned spacecraft come back to the Earth in a controlled re-entry. Scientists calculate（计算）the path of the falling spacecraft and its speed. They can guide the spacecraft to fall in a chosen area. In 2017,Tianzhou I, China's first cargo（货运）spacecraft, was directed to fall in the South Pacific Ocean.

    Some spacecraft may have problems while in space, or are simply no longer usable after a certain amount of time.  These craft come back in an uncontrolled re-entry.  It is hard to tell when and where these spacecraft will fall until the last few hours. The US space station Skylab came back partially uncontrolled in 1979. Parts of the station fell in western Australia, but no one was injured.

    During re-entry, most of the spacecraft will burn up while passing through the Earth's atmosphere. Only a small amount of the debris（碎片）will reach the ground.

    The debris typically ends up falling into the ocean, China Daily reported. Tiangong I weighs about 8.5tons. The amount of debris that falls to the Earth might be about 1 to 1.5 tons, the Beijing News reported.  That is about the same weight as a car.

    One day, I was in class, feeling fine, when all of a sudden my heart started racing. I broke out in a sweat, feeling hot and cold all over. My chest hurt, I was dizzy, and I felt like I couldn't breathe. Everything went blurry around the edges. Sure I was about to faint, I jerked up from my desk and ran from the room, terrified. I didn't care what the teacher thought, or that the eyes of the entire class were on me. I just had to get out of there.

    I ran to the nearest water fountain and drank some water. For several minutes, I just stood there holding on to the fountain. What was happening? Was I having a heart attack? Slowly, the lightheadedness went away. My heart stopped racing, and every other symptom faded too. I still had no idea what had happened but I was so glad it was over.

    Still I was really worried. I'd never felt that bad in my life. What was wrong with me? What if it came back?

    And then, an hour later, it did the pounding heart, the dizziness, the feeling that I was dying. Once again, I couldn't breathe. And this time, there was also pain throughout my entire upper body. I burst into tears and ran for the hallway again, actually afraid for my life. My teacher ran after me asking what was wrong. Panicking, I managed to choke out, "I need an ambulance: Please." I was sure I was dying.

    To my surprise, though, my teacher didn't grab her phone for help. Instead, she put her hand on my arm and told me to slow down. "Breathe, "she said." you're going to be okay. You just need to calm down. "

    I felt like I was going crazy. Here I was totally losing it, and she was acting like nothing was wrong! She kept on trying to calm me down, but I wasn't ready to listen. I was sure she didn't understand how I felt. How could she? How could anyone? Finally, my teacher explained that she was pretty sure I was having a panic attack. (They are also called anxiety attacks.) She knew, she said, because the same thing had happened to her when she was my age. She told me how she'd felt, and it was almost exactly how I was feeling now. She also explained that panic attacks are caused by anxiety (basically, excessive worry and fear that is part of your everyday life).

    I was shocked. I had no idea that there was even a name for what I was feeling let alone that it happened to other people, too! When I realized that she really did understand, I felt so relieved.

    My teacher talked to my parents, and they found me a counselor to help me deal with my anxiety. I'd been going through a tough time that year. My best friend had moved to a new school, and I wasn't sure how to fit in with the girls in my class. I'd never told anyone, though--I just kept it to myself. My counselor helped me understand that not dealing with my feelings can lead to panic attacks, and that I need to talk to someone when my life is stressful.

    Now when I start feeling overwhelmed or sad, I talk to my parents or friends and my counselor about whatever is bothering me, and they all help me sort things out. This way, I' m dealing with my anxiety and stress before it gets out of control.

    My counselor has also taught me some relaxation techniques and strategies that help me calm my body down at the first sign of a panic attack. I've learned to take deep breaths and relax my muscles. Or I'll focus on something else, or just tell myself I'm going to be okay. If one thing doesn't work, I'll try another one.

    It turns out that about one in every ten people has some kind of an anxiety disorder! Knowing that it's common and that life is stressful for a lot of girls of my age has helped me realize that I don't have to be ashamed or embarrassed about it.

    By sharing my story, I want other girls of my age to know that you're not as alone as you feel, and that talking about it really does help.

    No matter which place you decide to visit in Spain, you'll find a beautiful beach waiting just for you. These popular beaches can meet the needs of people from all walks of life.

    Cala de Algaiarens, Minorea

    With soft golden sand and clear water, this beach is perfect for snorkeling (浅滩潜水) and visiting underwater caves. The beach belongs to a local man, so tourists have to pay a small entry fee. The waves here can sometimes be huge so the beach isn't safe for kids.

    Cala Tarida, Ibiza

    Besides the big music festivals and the exciting nightlife, Ibiza is home to some of the most beautiful beaches; one of them is Cala Tarida. Just relax on the white sand or go swimming in clear water. It is an ideal location to spend a sunny day if you are in Ibiza.

    Beach of La Concha, San Sebastian

    It has been called the best city beach not just in Spain, but also in Europe. It's so popular during the holidays that tourists have to struggle to get some space. Even though the beach is a 10- minute walk from the city, the white sand and the amzing clear waters do make the city a new world.

    Sotavento, Canary Islands

    As an ideal choice for travelers, Sotavento offers 17 miles of white sandy beach. It is blessed with strong water and winds, making it a paradise (天堂) for surfers and kite flyers. The beach also hosts the popular World Kite Surf Championship every August.