Sunday is more like Monday than it used to be. Places of business that used to keep daytime“business hours” are now open late into the night. And on the Internet, the hour of the day and the day of the week have become irrelevant（不相关的）. A half century ago in the United States, most people experienced strong and precise dividing lines between days of rest and days of work, school time and summer time. Today the boundaries still exist, but they seem not clear.

    The law in almost all states used to require stores to close on Sunday; in most, it no longer does. It used to keep the schools open in all seasons except summer; in most, it still does. And whether the work week should strengthen its legal limits, or whether it should become more “flexible,” is often debated. How should we, as a society, organize our time? Should we go even further in relaxing the boundaries of time until we live in a world in which every minute is much like every other?

    These are not easy questions even to ask. Part of the difficulty is that we rarely recognize the “law of time” even when we meet it face to face. We know as children that we have to attend school a certain number of hours, a certain number of days, a certain number of years — but unless we meet the truant officer (学监), we may well think that we should go to school due to social custom and parents' demand rather than to the law. As adults we are familiar with “extra pay for overtime working,” but less familiar with the fact that what constitutes（构成）“overtime” is a matter of legal definition. When we turn the clock forward to start daylight-saving time, have we ever thought to ourselves: “Here is the law in action”? As we shall see, there is a lot of law that has great influence on how we organize and use time: compulsory education law, overtime law, and daylight-saving law — as well as law about Sunday closing, holidays, being late to work, time zones, and so on. Once we begin to look for it, we will have no trouble finding a law of time to examine and assess.

    Welcome to one of the largest collections of footwear（鞋类）in the world that will make you green with envy. Here at the Footwear Museum you can see exhibits（展品）from all over the world. You can find out about shoes worn by everyone from the Ancient Egyptians to pop stars.

    If humans were truly at home under the light of the moon and stars，we would go in darkness happily，the midnight world as visible to us as it is to the vast number of nocturnal(夜间活动的) species on this planet. Instead，we are diurnal creatures, with eyes adapted to living in the sun's light. This is a basic evolutionary fact, even though most of us don't think of ourselves as diurnal beings. Yet it's the only way to explain what we've done to the night: We've engineered it to  receive us by filling it with light.

    The benefits of this kind of engineering come with consequences 一 called light pollution 一 whose effects scientists are only now beginning to study. Light pollution is largely the result of bad  lighting design，which allows artificial light to shine outward and upward into the sky. III-designed lighting washes out the darkness of night and completely changes the light levels 一 and light  rhythms — to which many forms of life, including, ourselves, have adapted. Wherever human light spills into the natural world, some aspect or life is affected .

    In most cities the sky looks as though it has been emptied of stars, leaving behind a vacant haze(霾) that mirrors our fear of the dark. We've grown so used to this orange haze that the original glory of an unlit nigh, - dark enough for the planet Venus to throw shadow on Earth, is wholly beyond our experience, beyond memory almost.

    We^'ve lit up the night as if it were an unoccupied country, when nothing could be further form the truth. Among mammals alone, the number of nocturnal species is astonishing, Light is a powerful biological force, and on many species it acts as a magnet(磁铁). The effect is so powerful that scientists speak of songbirds and seabirds being “captured” by searchlights on land or by the light from gas flares on marine oil platforms. Migrating at night, birds tend to collide with brightly lit tall buildings.

    Frogs living near brightly lit highways suffer nocturnal light levels that are as much as a million times righter than normal, throwing nearly every aspect of their behavior out of joint including most other creatures ,we do need darkness .Darkness is as essential to our biological welfare, to our internal clockwork, as light itself.

    Living in a glare of our making,we have cut ourselves off from our evolutionary and cultural heritage—the light of the stars and the rhythms of day and night .In a very real sense light pollution causes us to lose sight of our true place in the universe, to forget the scale of our being, which is best measured against the dimensions of a deep night with the Milky Way—the edge of our galaxy arching overhead.

    The universe has never failed to catch human's attention. The ancient humans came up with stories to explain the presence of the suns and other planets. As time went by, humans set their sights on exploring the vastness of space. In 1969, astronaut Neil Armstrong became the first person to walk on the moon's surface.{#blank#}1{#/blank#}

    It allows people to know more about the universe.

    Undoubtedly, space exploration has answered the question of whether the earth is round or not and proved the earth does circle around the sun and not the other way around.{#blank#}2{#/blank#} It gives people a deeper understanding about the universe and provides them with more information about the world they live in.

    It paves the way to advanced technology.

    Scientists are always developing new technology for space programs, but the good news is that these new innovations(创新) aren't just useful for astronauts and space programs.{#blank#}3{#/blank#} In fact they have already led to the development of modern products and devices that many people use such as the GPS systems, and breast cancer test imaging, to name a few.

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    Space exploration doesn't just involve scientists and astronauts; it also requires the skills and labor of many engineers, research assistants, technicians, mechanics, and other professionals. If space exploration would be stopped today, these people would become jobless, and they wouldn't have the means to support themselves and their families.

    It can offer a solution to many problems.

    Aside from collecting information about the outer space, many space exploration programs are used to solve some of the problems with our modern society. Some programs, for example, help scientists learn more about the earth's atmosphere and know how to better predict weather and natural disasters.{#blank#}5{#/blank#} This may be the solution to the earth's growing population.

    Space exploration is one of the biggest achievements of humans as a whole, and it has paved the way to greater scientific understanding and technological advancement over the years. I can see no reason why we should stop our exploration.

A. It creates many jobs.

B. But it does much more than that.

C. It was a big step in space exploration.

D. They can also be used in other industries.

E. They also help scientists know more about the earth.

F. Others focus on looking for planets that can support human life.

G. Since then, space exploration has been going on and brought many benefits.

    Global warming is the process of earth's atmosphere heating up. Over the last 100 years, the average temperature of earth's atmosphere has gone up 1 Fahrenheit. The weather has not changed exactly the same way in every area of the planet. But scientists think that the rise in average temperature is already affecting the earth, s climate.

    Many scientists now believe that global warming is caused by cutting down trees, producing more trash, and polluting the environment are some of the reasons that the temperature has gone up. Many scientists believe that the biggest causes of global warming are new human technologies that release greenhouse gases into the atmosphere.

    The greenhouse effect is not new. Certain gases in the atmosphere, like carbon dioxide, nitrous oxide and methane, prevent heat energy from escaping back into space. In the past, the climate didn't change much because nature produced just the right amount of greenhouse gases to deal with it.

    Today, most scientists are pretty sure that the rising temperature can't be blamed on nature. Ever since the industrial revolution in the 1700s, humans have relied on machines for daily life. And many of those machines give off a lot of greenhouse gases. An increase in the release of greenhouse gases from human activities is throwing nature off balance.

    The climate is a very complicated thing, but many scientists agree that the rising atmospheric temperature has already damaged the environment. Sheets of ice, called glaciers, are melting in Antarctica and other parts of the globe. As glaciers break off and melt into the oceans, they are adding warm water to the oceans and causing the sea level to rise.

    Over the past last 100 years, the sea level has risen 6-8 inches around the world. That means land along the coasts is beginning to disappear under water. Bigger and warmer oceans are also adding to other weather problems caused by pollution in the atmosphere. Some places have received more rain, others have had bigger storms and a few areas in the world have experienced unusual droughts.

    If you live in a city where everyone rushes, realise that you don't have to be like everyone else. You can be different. I can't give you a step-by-step guide to moving slower, but here are some ideas to consider and perhaps adopt, if they work for your life

    ⒈Do less

Cut back on your projects, on your task list, on how much you try to do each day. Focus not on quantity but on quality. {#blank#}1{#/blank#}

    ⒉Have fewer meetings

    {#blank#}2{#/blank#} Try to reduce the number of meetings and have blocks of time with no interruptions, so you don't have to rush from one meeting to another.

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    If you're constantly rushing to appointments or other places, it's because you don't allot(分配)enough time in your schedule for preparing and for travelling. Pad your schedule to allow time for this stuff. If you think it only takes you 10 minutes to get ready for work or a date, perhaps give yourself 30 to 45 minutes so you don't have to shave in a rush or put on makeup in the car.

    ⒋Practise being comfortable with sitting and doing nothing.

    When people have to wait, they become impatient or uncomfortable. Try standing in a line and just watching and listening to people around you. {#blank#}4{#/blank#}

    ⒌Realise that if it doesn't get done, that's OK

    {#blank#}5{#/blank#} And yes, I know that's a frustrating attitude for some of you who don't like laziness or living without firm deadlines, but it's also reality. The world won't end if you don't get that task done today.

    Try these things out. Life is better when unrushed.

    Remember the quote: if nature can get everything done without rushing, so can you.

A. Do nothing but wait.

B. Pick two or three important things-or even just one -and work on those first.

C. Start to put off or cancel the unnecessary.

D. Give yourself time to get ready and get there.

E. Meetings are usually a big waste of time and make you rush.

F. There's always tomorrow.

G. It takes practice, but after a while, you'll do it with a smile.