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　　In America, on school and work days, breakfast in most homes is often a hurried meal of milk, bread, juice or coffee．Some people even don't have it in order to get to 　　1　　 or school on time．Others just stop at coffee shops for coffee．But on weekends, 　　2　　 are quite different．People usually get up late, so they have enough time to have a large breakfast with eggs, home-fries potatoes and bread．

　　Lunch is just a 　　3　　 break from the day's work rather than a large, long meal．It usually lasts 　　4　　 half an hour or an hour, so family members do not have time to 　　5　　 home．Most people have a sandwich or a hamburger, and fruit or ice-cream for lunch．　　6　　 people either take their lunches to work in the brown paper“lunch bag”, 　　7　　 eat a sandwich at a fast food restaurant．Children 　　8　　 to bring the“lunch box”．

　　Dinner is the most 　　9　　 meal of the day in the United States．At this meal, most American families can sit down 　　10　　．It is usually a hot, large meal and it is quite different from lunch．Lunch is often cold and quick．　　11　　 usually cooked dinner for their families in the past．Nowadays, 　　12　　, with more women working and as a result of“women's liberation(解放)”, men are doing more in the 　　13　　．Dinners throughout America are quite 　　14　　, but most people have a meat dish, a vegetable, and rice or bread．Milk, water and soft drinks are common at dinner, but wine is only for 　　15　　 occasions(场合)．Dinner is usually eaten between 5∶00 p.m. and 7∶00 p.m. and often later in restaurants．Most Americans enjoy themselves at this time．

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阅读理解

　　In the summer of 1978 an English man named Steven was driving his tractor through a field of wheat when he discovered something strange．Some of his wheat was lying on the ground．The flattened wheat formed(形成)a circle about six meters across．Around this circle were four smaller circles of flattened wheat．

　　Three years later a farmer who lived nearby discovered almost the same circles in one of his fields．These circles were larger－nearly 15 meters across．That same year , another English farmer discovered three circles of flattened wheat on his land－one large circle between two small circles．During the following years, farmers in England found circles in their fields more and more often．

　　The circles are called “crop circles” because they usually appear in fields of wheat or corn．The wheat in the circles lies on the ground but is never broken; it keeps on growing, and the farmers can later harvest it．Farmers always discover the crop circles in the morning, so the circles probably form at night．They appear only in the months from May to September．What causes the crop circles?

　　At first, people thought that some kids were making them as a joke, or that farmers were making them to attract tourists．(In fact, in 1991, two men said they made the circles themselves, but many scientists don't believe them．)People tried to copy them：They tried to make circles exactly like the ones the farmers had found．They couldn't do it．They couldn't enter a field of wheat without leaving tracks, and they couldn't flatten the wheat without breaking it．

　　Several times people reported seeing stranger objects near the fields where crop circles later appeared．Many people believe that these crop circles are the messages sent by living things from outer space(外层空间)or the marks left by their spaceships．

　　Scientists who have studied the crop circles try to find out what causes them．In the summer of 1990 some scientists spent three weeks in the part of England where many circles have appeared．They had all the latest high-tech equipment(最新高科技设备)．The equipment－worth 1.8 million dollars－got nothing．But one night, as the scientists were watching a field, crop circles formed in the field behind them, which were quite different from the others．The scientists had neither seen nor heard anything．

　　When Steven discovered the crop circles on his land in 1978, he said, “It was just like something that had landed in the field from the air and gone back up again．I don't know what to make of these things．”

　　Crop circles have appeared in England, Japan, the United States and Russia．Experts from all over the world have studied them, and they say what Steven said：They don't know what to make of these things．

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