【正文】 objects in the sky. And you can see those objects in more and more detail. But scientists believe there are some things in the sky that we will never see. We won‘t see them with the biggest telescope in the world, on the clearest night of the year. That‘s because they‘re invisible. They‘re the mysterious dead stars called black holes. You might find it hard to imagine that stars die. After all, our Sun is a star. Year after year we see it up in the sky, burning brightly, giving us heat and light. The Sun certainly doesn‘t seem to be getting old or weak. But stars do burn out and die after billions of years. As a star‘s gases burn, they give off light and heat. But when the gas runs out, the star stops burning and begins to die. As the star cools, the outer layers of the star pull in toward the center. The star squashes into a smaller and smaller ball. If the star was very small, the star ends up as a cold, dark ball called a black dwarf. If the star was very big, it keeps squashing inward until it‘s packed together tighter than anything in the universe. Imagine if the Earth were crushed until it was the size of a tiny marble. That‘s how tightly this dead star, a black hole, is packed. What pulls the star in toward its center with such power? It‘s the same force that pulls you down when you jump – the force called gravity. A black hole is so tightly packed that its gravity sucks in everything – even light. The light from a black hole can never e back to your eyes. That‘s why you see nothing but blackness. So the next time you stare up at the night sky, remember: there‘s more in the sky than meets the eye! Scattered in the silent darkness are black holes – the great mystery of space. 3. According to the article, what causes a star to die? A. As it gets hotter and hotter, it explodes. B. It collides with other stars. C. It can only live for about a million years. D. As its gases run out, it cools down. 4. Which of the following statements is NOT a fact? A. Black holes are dead stars. B. There is nothing as mysterious as a black hole. C. Black holes are invisible. D. Black holes have gravity. of the following is NOT a feature of a black dwarf? A. It is usually bigger than a white dwarf. B. It is dark. C. It is smaller in size than a mon star. D. It is cold. 6. Why can‘t you see light when you look at a black hole? A. For most black holes are so far away. B. As the star‘s gases burn, it stops giving off heat and light. C. As a star cools, its outer layers pull in toward its center. D. The gravity of a black hole is so strong that it sucks the light inward. C In life, we will succeed and fail often for reasons that are entirely out of our control. For instance, we can be incredibly nice and love someone deeply, and they may not love us back. We can work harder than anyone else in the office and still not be promoted to management. We can eat healthy food, exercise and stay away from alcohol and cigarettes, and still get sick. The bottom line is that life is not fair. That is a tough pill to swallow for many of us. As a result, some people shut down after being hit by even one unfair blow from life. They can‘t handle the fact that our efforts don‘t always get the results that we expect. But if we let life‘s unfairness defeat us, we will never receive the beautiful blessings (幸事 ) that life has in store for us. For example, my first marriage ended in divorce. To me, it felt very unfair. I had worked hard to be a good wife and mother. However, no matter what I did, I could not make the relationship work. I could have been shut down by that experience. I could have decided that if one person didn‘t appreciate me as a wife, then no one would. I could have given up. But I knew that I wanted to be married. I knew that I wanted to experience traditional family life. So I didn‘t let one seemingly unfair experience stop me from believing that I could one day be happily married. And then one day, I met this kind, thoughtful, generous man with whom I now have a wonderful friendship and marriage. But that wouldn‘t have happened if I had decided to give up after one failed marriage. What I‘ve learned over the years is that we can do all the things that deserve a good oute, but get bad things in return instead. When we are faced with life‘s seeming unfairness, our faith needs to jump in. When life doesn‘t go according to plan, we have to let go of the oute that we are looking forward to and keep trying, working hard and doing the right thing. Please don‘t be discouraged. Accept that life is neither fair nor straightforward. And by knowing that if we remain confident, we can drive our unfair experiences away and use them for our benefit. 7. We can learn from the first three paragraphs that ______. A. life doesn‘t often turn out the way we expect B. the author thinks life should reward us for our efforts C. unsatisfactory results simply mean your effort is not enough D. people should focus on the process rather than the outes 8. The author wrote about her unsuccessful marriage to ______. A. plain about the unfairness of her life and marriage B. tell readers how she met her second husband and became happily married C. express how proud she is for not being shut down by a blow from life D. show that we need to have faith and continue working for our goals 9. When we encounter unfairness in life, the author suggests we ______. a. do nothing but accept them b. be confident with ourselves c. keep doing what we should do d. find out what has gone wrong A. ab B. ad C. bc D. cd 10. The author wrote the article mainly to ______. A. share her experiences of unfairness in life B. tell us how to deal with life‘s seeming unfairness C. tell us that life has beauti