How do you spend your spare time? There will be different answers to it. Most people in Poland (波兰) have their own ways of spending free time. Sometimes they just want to take a rest, but they try to do something more pleasant most of the time. They have many different hobbies, which help them to get away their everyday problems and spend their free time happily.

Many Polish (波兰的) people like traveling. They always look for new places that they have never been to and add new and exciting experiences to their journey. Some of them like to climb mountains, others like to go to a sea or a lake to swim, because these can make them get exercise and are good for their health.

    Many Polish people also like to do sports in their free time. They are usually crazy about football, and football is regarded as the Polish national sport. Many football fans may support a certain team, so they go to watch every match of the team they support, and they buy many things that have any relation with the team. Watching sport and doing it both are good ways to relax.

In addition, doctors say that doing sports is very good for health. Many people in town, especially young men, often go to the gym to attend the exercise classes to keep it.

    Besides these ways, Polish people have many other ways to spend their free time. And they really enjoy their free time.

    Early in the morning, at noon, or in the evening in big cities and in the countryside, all over the United States, you can see Americans running-men and women, young and old.  People run 1-along the beaches of California, 2 Central Park in New York, down quiet streets in small towns or at the gym.  Some people even run in 3 living rooms.

    Running wasn't so popular in the past. In the 1960s, runners were mostly athletes and healthy strong people.  When people saw a runner, they used 4, "Hey, what's the hurry for?" or they might say to 5, "Is he crazy?" At that time, women almost never ran. If they did, they might be laughed at. But today all these have 6 Men and women of all 7 enjoy running.

    Doctors say many of the health problems in the United States 8 these bad habits: eating too much, smoking cigarettes, and taking 9 exercise. Doctors tell us, "Eat less, don't smoke, and exercise more." Running is a good exercise 10 it helps build strong hearts and lungs. It also helps most people lose weight

    Mike was an ordinary cat. He had two ears, four paws（爪子）and a short tail. Wait a minute! A short tail? All the other cats that Mike had seen had 1ails, so Mike decided to2a long tail.

    Mike travelled far and wide, trying to 3a long tail. Along the way, he spoke with many cats that had long tails. “Mike, what a (n) 4 cat you are!” they would say. “We have never seen a cat with a short tail.” The cats would sit around Mike, 5all kinds of questions about what it was like to have a short tail. Mike often found himself telling stories of how he could sleep in front of warm fireplaces, never having to6 whether someone was going to step on his tail. It wasn't long before Mike became 7! More cats came to him to hear his8 stories.

    Soon, Mike 9 that he had left home in order to find a long tail! Maybe being a cat with a short tail wasn’t so 10. Because of his unique (独一无二) tail, Mike had made many friends.  “I guess being one of a kind is not so bad after all,” Mike thought. “I think I'll keep my short tail.”

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 (看不见的). They're the 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 bum, 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 part of the star is  pulled in toward the center. The star turns into a smaller and smaller ball. If the star is very small, the star ends up as a cold, dark ball. If the star is very big, it keeps being pulled inward until it's packed together tighter than anything in the universe.

   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 (重力). A black hole is so tightly packed that its gravity sucks (吸) in everything --- even light. The light from a black hole can never come back to your eyes. That's why you see nothing but blackness.