【文章內(nèi)容簡介】 arly, it will be good for your heart and bones. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control.Whatever sport you take up, you can make it greener by using environmentfriendly equipment and buying products made from recycled materials. But the final goal should be “green gyms”. They are better replacements for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership. And best of all, it’s free.56. Which of the following is the author most probably in favor of?　　A. Cycling around a lake. B. Motor racing in the desert.　　C. Playing basketball in a gym. D. Swimming in a sports center.57. What do we know about golf from the passage?　　A. It is popular in Portugal and Spain.　　B. It causes water shortages around the world.　　C. It pollutes the earth with chemicals and wastes.　　D. It needs water and other sources to keep its courses green.58. The author uses power walking as an example mainly because ___________.　　A. it is an outdoor sport B. it improves our health　　C. it uses fewer resources D. it is remended by experts59. The author writes the passage to _______.　　A. show us the function of major sports　　B. encourage us to go in for green sports　　C. discuss the major influence of popular sports　　D. introduce different types of environmentfriendly sportsBThe surprising experiment I am about to describe proves that air is all around you and that it presses down upon you. Air pressure is a powerful force. When you swim underwater, you can feel water pushing on your body. The air all around you does the same. However, your body is so used to it that you do not notice this. The pressure is caused by a layer (層) of air called the atmosphere. This layer surrounds the Earth, extending to about five kilometers above the Earth’s surface.The following experiment is an easy one that you can do at home. But make sure that you are supervised (監(jiān)督), because you will need to use matches. Now for the experiment.What you need● hardboiled egg without the shell● A bottle with a neck slightly smaller than the egg● A piece of paper● A matchMethod1) Check that the egg will sit firmly on the neck of the bottle.2) Tear the paper into pieces and put them into the bottle.3) Light the paper by dropping a burning match into the bottle.4) Quickly sit the egg on the neck of the bottle.ResultAstonishingly, the egg will be sucked into the bottle. Your friends will be amazed when you show them the experiment. But be careful when you handle matches.Why it happened？As the paper burns, it needs oxygen and uses up the oxygen (air) in the bottle. The egg acts as a scale in the neck of the bottle, so no more air can get inside. This reduces the air pressure inside the bottle. The air pressure must equalize, so more air from outside must enter the bottle. The outside air presses against the egg, and then the egg is pushed into the bottle! This proves that air is all around and that it is pressing down on us.60. Why is there the need to take care when you are doing the experiment?A. The bottle could break. B. You need to light the paper with a match.C. The egg needs to be shelled (脫殼). D. The egg has to be perfectly placed on the neck of the bottle.61. How did the egg get into the bottle?A. The oxygen inside the bottle sucked the egg in. B. It became soft without the shell.C. The neck of the bottle was wide enough.D. The outside air pressure forced it into the bottle.62. The experiment is carried out to prove .A. water pushes on your body when you swim underwaterB. the earth is surrounded by a layer of air called the atmosphereC. the pressure of air around us has a powerful forceD. the air pressure is not equalized around usCIn many societies, it is important to have many children. In the US, a few religious groups emphasize (強調(diào)) the importance of large families, but most people think one or two children are enough, and many couples have no children. Because taking care of a child is very costly, financially, emotionally, and socially, many couples view large families as a disadvantage. For example, having many children would restrict the freedom and individualism of the parents as well as the other children in the family. Parents teach individualism by the way they raise their children. They want to create a selfreliant (自信的), independent child, who can make it on her own by age eighteen. Parents begin teaching this selfreliance early, asking the child to do things on her own and praising her when she does. Many parents want to expose their children to a variety of situations. They bring their children with them to church, to