【正文】 nary lives． For example, the information for weather forecasts is sent by satellite． Some satellites have cameras which take photographs of the Earth to show how clouds are moving． Satellites are also used to connect our international phone calls． Computer connections of the World Wide Web and Inter also use satellites. Many of our TV programs e to US through satellites． Airplane pilots also sometimes use a satellite to help them find their exact location． We use satellites to send television pictures from one part of the world to another． They are usually 35， 880 kilometers above the equator． Sometimes we can see a satellite in the sky and it seems to stay in the same place． This is because it is moving around the world at 11， 000 kilometers an hour— exactly the same speed that the earth rotates． A satellite must orbit the Earth with its antennae(天線 )facing the earth． Sometimes, it moves away from its orbit， So there are little rockets on it which are used to put the satellite back in the right position． This usually happens about every five or six days． Space is not empty! Every week, more and more satellites are sent into space to orbit the Earth． A satellite usually works for about 1012 years． Satellites which are broken are sometimes repaired by astronauts or sometimes brought back to Earth to be repaired． Often， very old or broken satellites are left in space to orbit the Earth for a very long time． This is very serious because some satellites use nuclear power and they can crash into each other． 67． Which of the following is NOT done by satellites according to the passage? A． Sending information for weather forecast． B． Taking photographs of the Earth． C． Sending TV pictures． D． Providing food for airplane pilots． 68． What’s the speed the earth rotates at? A． 35,880 kilometers per hour． B． 335,880 kilometers per hour． C． 11,000 kilometers per hour． D． 110,000 kilometers per hour 69． Why does the satellite move around the world at the same speed as the Earth rotates? A． In order to take photographs． B． In order to stay in a certain position in the orbit． C． In order to move away from its orbit． D． In order to send television pictures． 70． What does the underlined word “This” in the 3 rd paragraph refer to? A． A satellite． B． A little rocket． C． A satellite seems to stay in the same place in the sky． D． The satellite puts the rockets in the right position． 71． Which is true of satellites? A． A satellite usually works for about 1012 years． B． Every time a satellite gets broken， it is brought back to the Earth to be repaired． C． A broken satellite is never left in space． D． They often crash into each other． E For much of the world, vegetarianism (素食主義 ) is largely a matter of economics: Meat costs a lot more than beans or rice, so meat bees a specialoccasion dish. Even where meat is more plentiful, it’s still used in control, and it often provides a side note to a meal rather than taking center stage. In countries like the United States where meat is not as expensive, though, people choose to be vegetarians for reasons other than cost. Parental preferences(父母親的偏愛 ), religious or other beliefs, and health problems are among the most mon reasons for choosing to be a vegetarian. Many people choose a vegetarian diet out of concern over animal rights or the environment. And lots of people have more than one reason for choosing vegetarianism. Different people follow different forms of vegetarianism. A true vegetarian eats no meat at all, including chicken and fish. A lactoovo(乳制品 ) vegetarian eats dairy products and eggs, but keeps out meat, fish, and chicken. It follows, then, that a lacto(乳，乳汁 ) vegetarian eats dairy products but not eggs, and an ovo （蛋，雞蛋） vegetarian eats eggs but not dairy products. A stricter form of vegetarianism is veganism. Not only are eggs and dairy products excluded (排除 ) from a vegan diet, so are animal products like honey. Some macrobiotic (養(yǎng)生的 ) diets fall into the vegan category. Macrobiotic diets limit not only animal products but also refined（經(jīng)過提煉的） and processed foods, foods with preservatives, and foods that contain caffeine or other stimulants (刺激物 ). Following a macrobiotic or vegan diet could lead to nutritional deficiencies (營(yíng)養(yǎng)不足 ) in some people. Teens need to be sure their diets include enough nutrients to fuel growth, particularly protein and calcium (鈣 ). If you’re interested in following a vegan or macrobiotic diet it’s a good idea to talk to a registered dietitian（營(yíng)養(yǎng)學(xué)家） . He or she can help you design meal plans that include enough nutrients. 72. The underlined sentence in the first paragraph probably means ______. A. there is usually a note beside the meat in a meal B. meat often attracts people’s attention in a meal C. meat is served only a small amount in a meal D. meat should play an important part in a meal 73. Which of the following is NOT the reason for Americans being vegetarians? A. They are environmentally friendly. B. They are concerned about the rights of animals. C. They worry