High school plays a major role in shaping up your future and your whole development. Extracurricular (课外的) activities along with the studies can be very helpful. Make yourself take part in various activities and at the same time try to stand out in your studies. When you move out to college these efforts that you put in may count for a lot.

    High school is not just about books or classes. Schools always provide opportunities for students to socialize (社交). There are various group tasks designed which allow the students to learn to work together.

    High school is the right time for you to discover yourself and bring out some of your hidden talents. In your lessons, you may find that you are better at English than you were earlier or have grown an interest for Math. High school also provides many other opportunities for students to take part in. These help develop leadership skills and management skills at an early age, which in turn is a way of preparing students to manage and plan their careers (事业) better.

    Balancing all activities is an experience in time management. If you have taken up a part-time job along with your high school you would have to arrange your time for studies, and extracurricular activities. Such management can go a long way in teaching you to manage things better when you take up a job. Moreover, they help build your character. You would be better prepared for additional stress that you may feel sometimes.

    When at high school you should pick up your classes wisely. Depending upon what you like and your career plan you should choose suitable classes. Doing something that you hardly like may get you very low grades as well as lose valuable time. Take up interesting and challenging classes that would allow you to put in those extra efforts.

    If two scientists at Los Alamos National Laboratory are correct, people will still be driving gasoline powered cars 50 years from now, giving out heat-trapping carbon dioxide(二氧化碳) into the atmosphere—and yet that carbon dioxide will not contribute to global warming.

    In a proposal by two scientists, vehicle emissions(排放) would no longer contribute to global warming. The scientists, F. Jeffrey Martin and William L. Kubic Jr., are proposing a concept, which they have named Green Freedom, for removing carbon dioxide from the air and turning it back into gasoline.

The idea is simple. Air would be blown over a liquid solution of potassium carbonate, which would absorb the carbon dioxide. The carbon dioxide would then be put to chemical reactions that would turn it into fuel(燃料): gasoline or jet fuel.

    This process could change carbon dioxide from an unwanted, climate-changing pollutant into a vast resource for renewable fuels. The cycle—equal amounts of carbon dioxide produced and removed—would mean that cars, trucks and airplanes using the synthetic(合成的) fuels would no longer be contributing to global warming.

    Although they have not yet built a synthetic fuel factory, or even a small model, the scientists say it is all based on existing technology. “Everything in the concept has been built, is operating or has a close cousin that is operating.” Dr. Martin said.

    The Los Alamos proposal does not go against any laws of physics, and other scientists who have independently suggested similar ideas. Dr. Martin said he and Dr. Kubic had worked out their concept in more detail than former proposals.

    There is, however, a major fact that explains why no one has built a carbon-dioxide-to-gasoline factory: it requires a great deal of energy.

    According to their analysis, their concept, which would cost about $5 billion to build, could produce gasoline at an operating cost of $1.40 a gallon and would turn economically practical when the price at the pump hits $4.60 a gallon.

    Other scientists said the Los Alamos proposal perhaps looked promising but could not evaluate it fully because the details had not been published. “It's definitely worth pursuing,” said Martin I. Hoffert, a professor of physics at New York University. “It's not that new an idea. It has a couple of pieces to it that are interesting.”

    Some people were eating and drinking in a coffee house. A young woman was sitting alone at a table. She was wearing a beautiful diamond necklace. There was an ugly man at a table not far from her. He was looking at her necklace all the time.

    Suddenly the lights went out. The coffee house was in darkness. The woman started to shout. She was very frightened. A few minutes later the lights came on again. The woman was crying. Her necklace was missing.

    The manager quickly closed all the doors. He telephoned the police. No one could get out of the coffee house. The policemen soon came. The police inspector told his men to search everyone. The necklace was not on anyone. They then searched the whole coffee house. The necklace couldn't be found.

The police inspector then looked at the faces of all the people in the coffee house. He saw the ugly man and looked at the man carefully. He went up to the man and picked up the bowl of soup that was on his table. He then poured the soup into a glass. The necklace fell out. The policemen caught hold of the man and took him away. The young woman was happy to get back her necklace.

阅读短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。

    My parents were in a huge argument, and I was really upset about it. I didn't know who I should talk with about how I was feeling. So I asked Mom to allow me to stay the night at my best friend's house. Though I knew I wouldn't tell her about my parents' situation, I was looking forward to getting out of the house. I was in the middle of packing up my things when suddenly the power went out in the neighborhood. Mom came to tell me that I should stay with my grandpa until the power came back on.

    I was really disappointed because I felt that we did not have much to talk about. But I knew he would be frightened alone in the dark. I went to his room and told him that I'd stay with him until the power was restored. He was quite happy and said, “Great opportunity.”

    “What is it?” I asked.

    “To talk, you and I” he said. “To hold a private little meeting about what we're going to do with your mom and dad, and what we're going to do with ourselves now that we're in the situation we are in.”

    “But we can't do anything about it. Grandpa,” I said, surprised that here was someone with whom I could share my feelings and someone who was in the same “boat” as I was.

    And that's how the most unbelievable friendship between my grandfather and me started. Sitting in the dark, we talked about our feelings and fears of life — from how fast things change to how they sometimes don't change fast enough. That night, because the power went out, I found a new friend, with whom I could safely talk about all my fears and pains, whatever they may be. Suddenly, the lights all came back on. “Well,” he said, “I guess that means you'll want to go now. I really like our talk. I hope the power will go out every few nights!”

    “Don't be afraid to give your best to what seemingly are small jobs. Every time you conquer one it makes you much stronger. If you do little jobs well, the big ones will tend to take care of themselves,” said Dale Carnegie.

    Sometimes, doing your best work or trying your hardest at something is difficult. It may have something to do with trying to do something new for the first time, like a new sport or activity at school. It may have something to do with doing homework for a subject that is not your favorite or is not your best.

    As Hunter S. Thompson once said, “Anything worth doing is worth doing right.” And as Albert Einstein added, “We have to do the best we can. This is our sacred human responsibility.”

Developing the habit of trying your hardest and doing your best is something that will help you succeed throughout your life. If you have looked at some quotes related to trying your hardest, you will see that many of them come from people who have made a big difference in the world. This is not a coincidence. It was not only their cleverness that helped them stand out and change the world, but their ability to try their hardest and do their best in whatever they were doing. If you can develop this same habit—to do your best in any situation, it will be a great benefit to your family, career, school and community.

    As Bob Cousy put it, “Do your best when no one is looking. If you do that, then you can be successful at anything you put your mind to.” The choice is yours.

    Two things changed my life:  my mother and a white plastic bike basket. I have thought long and hard about it and it's true. I would be a different person if my mom hadn't turned a silly bicycle accessory into a life lesson I carry with me today.

    My mother and father were united in their way of raising children, but it mostly fell to my mother to actually carry it out. Looking back, I honestly don't know how she did it. Managing the family budget must have been a very hard task, but she made it look effortless. If we complained about not having what another kid did, we'd hear something like, “I don't care what so –and –so got for his birthday, you are not getting a TV in your room a car for your birthday a lsvish sweet 16 party.” We had to earn our allowance by doing chores around the house. I can still remember how long it took to polish the legs of our coffee table. My brothers can no doubt remember hours spent cleaning the house .Like the two little girls growing up at the White House, we made our own beds (no one left the house until that was done)and picked up after ourselves. We had to keep track of our belongings, and if something was lost, it was not replaced.

It was summer and ,one day ,my mother drove me to the bike shop to get a tire fixed—and there it was in the window, White, shiny, plastic and decorated with flowers ,the basket winked at me and I knew —-I knew—I had to have it.

    “It's beautiful,” my mother said when I pointed it out to her,” What a neat basket.”

    I tried to hold off at first, I played it cool for a short while. But then I guess I couldn't at and it any longer: “Mom, please can I please, please get it? I'll do extra chores for as long as you say, I'll do anything, but I need that basket, I love that basket. Please, Mom. Please?”

    I was desperate.

    “You know,” she said, gently rubbing my back while we both stared at what I believes was the coolest thing ever,” If you save up you could buy this yourself.”

“By the time I make enough it'll be gone!”

    “Maybe Roger here could hold it for you,” she smiled at Roger, the bike guy.

    “He can't hold it for that long, Mom .Someone else will buy it .Please, Mom, Please?”

    “There might be another way,” she said.

    And so our paying plan unfolded. My mother bought the beautiful basket and put it safely in some hiding place I couldn't find. Each week I eagerly counted my growing saving increased by extra work here and there (washing the car ,helping my mother make dinner, delivering or collecting things on my bike that already looked naked without the basket in front).And then ,weeks later ,I counted ,re-counted and jumped for joy. Oh, happy day! I made it! I finally had the exact amount we'd agreed upon….

    Days later the unthinkable happened. A neighborhood girl I'd played with millions of times appeared with the exact same basket fixed to her shiny, new bike that already had all the bells and whistles. I rode hard and fast home to tell my mother about this disaster. This horrible turn of events.

    And then came the lesson. I've taken with me through my life:” Honey, Your basket is extra-special,” Mom said, gently wiping away my hot tears.” Your basket is special because you paid for it yourself.”