Snow falls in the Earth's extreme North and South throughout the year. However, the heaviest snowfalls have been reported in the mountains of other areas during winter. Snow is even known to fall near the Equator (赤道), but only on the highest mountains.

    Snow contains much less water than rain, but much of the water the world uses comes from snow. {#blank#}1{#/blank#} In the western United States, mountain snow provides up to seventy-five percent of all surface water supplies.

    Snowfall helps to protect plants and some wild animals from winter weather. Fresh snow is made largely of air trapped among the snow crystals (晶体). Because the air has trouble moving, the movement of heat is limited. {#blank#}2{#/blank#} The surface of the snow takes in, or absorbs, sound waves. As snow grows older or if there have been strong winds, it can become hard and flat. Then, the snow's surface will help to send back sound waves.

    {#blank#}3{#/blank#} It is responsible for the deaths of hundreds of people. Many people die in traffic accidents on roads covered with snow and ice or from being seriously stuck in the winter storm. {#blank#}4{#/blank#}.

    People may not be able to avoid living in areas where it snows often. However, they can avoid becoming victims of snowstorms. People should stop driving and stay at home until the storm has passed. People living in these areas should carry emergency supplies in their vehicle. {#blank#}5{#/blank#}

A. These include food, emergency medical supplies, and extra clothing to stay warm and dry.

B. Snow also influences the movement of sound waves.

C. Melting snow provides water for rivers, electric power stations and agricultural crops.

D. Mountain snowfall is heavier than that in the South and the North Poles.

E. In many places, streets were blocked; houses fell down and supplies were short.

F. Others die from heart attacks caused by too much physical activity out in the cold.

G. Snow may be beautiful, but it can be deadly.

    Have you ever seen the pictures of those suffering people who struggle every day for just a few drops of water? Water is not a never-ending resource（资源）,but a resource more valuable and limited than anything else on the earth. {#blank#}1{#/blank#}But drinking water is becoming less and less.It is important that people understand this.{#blank#}2{#/blank#}

    According to a senior official,China is facing a water crisis（危机）more serious than any other countries in the world.{#blank#}3{#/blank#}Measures must be taken to save water.

    {#blank#}4{#/blank#}?By following these simple suggestions,you will save money on your water bill.Vegetables and fruit should be washed in a bowl rather than under a running tap.Never put the water down the drain（下水道）when there may be another use for it such as watering a plant or cleaning.

    Avoid washing the toilet unnecessarily.{#blank#}5{#/blank#}Take shorter showers.Do not let water run while shaving,brushing your teeth or washing your hair or face.Recently,Singaporeans were urged to shower a minute less as part of a national water protection effort.

    By thinking carefully about your water use in the home and changing some water wasting habits,it is easy to save water.

A.Do not use your toilet as a wastebasket.

B.Saving water is the proper thing to do now.

C.Some other countries are facing water problems.

D.The crisis is caused by widespread drought（大面积的干旱）,pollution,rapid economic growth and waste.

E.Water is the most important thing for life.

F.People can overcome drought by saving water.

G.It is important to use water wisely.

    A rejection letter is one of those letters that are not very easy to write.{#blank#}1{#/blank#}. For example, organizations usually have to send rejection letters to applicants they cannot hire. So how to write a rejection letter?

    Make the words professional and proper

    What matters most in a rejection letter is the professional tone and wording. {#blank#}2{#/blank#}Instead, your choice of words should make the reader feel that he or she would do the same thing if they were in your place.

    Keep it clear and simple

    {#blank#}3{#/blank#}. Nobody likes to read a long, winding rejection letter. Therefore, it is better to deliver the message of rejection in the beginning itself. Clearly state that you have decided to reject the request or application. Don't beat about the bush and don't try to give the impression that your decision could change{#blank#}4{#/blank#}. Explain why your decision is good for everyone.

    {#blank#}5{#/blank#}

    Conclude with a statement of goodwill(友好). You may have rejected this application, but if you intend to consider this person for another job in the future, you may express that as well. However, that isn't always necessary. In some situations such endings might offend(冒犯) the reader.

    It is easy to miss amid the day-to-day headlines of global economic recession, but there is a less obvious kind of social upheaval（剧变）underway that is fast changing both the face of the planet and the way human beings live. That change is the rapid growth in urbanization. In 2008, for the first time in human history, more than half the world's population was living in towns and cities. And as a recently published paper shows, the process of urbanization will only accelerate in the decades to come—with an enormous impact on biodiversity and potentially on climate change.

    As Karen Seto, the lead author of the paper, points out, the wave of urbanization isn't just about the migration of people into urban environments, but about the environments themselves becoming bigger to provide enough room for all those people. The rapid expansion of urban areas will have a huge impact on biodiversity hotspots and on carbon emissions in those urban areas.

    Humans are the ultimate invasive species-when they move into new territory, they often displace the wildlife that was already living there. And as land is cleared for those new cities—especially in the dense tropical forests-carbon will be released into the atmosphere as well. It's true that as people in developing nations move from the countryside to the city, the shift may reduce the pressure on land, which could in turn be good for the environment. This is especially so in desperately poor countries, where residents in the countryside slash and burn forests each growing season to clear space for farming. But the real difference is that in developing nations, the move from rural areas to cities often leads to an accompanying increase in income—and that increase leads to an increase in the consumption of food and energy, which in turn causes a rise in carbon emissions. Getting enough to eat and enjoying the safety and comfort of living fully on the grid is certainly a good thing-but it does carry an environmental price.

    The urbanization wave can't be stopped—and it shouldn't be. But Seto's paper does underscore the importance of managing that transition. If we do it the right way, we can reduce urbanization's impacts on the environment “There's an enormous opportunity here, and a lot of pressure and responsibility to think about how we urbanize,” says Seto. “One thing that's clear is that we can't build cities the way we have over the last couple of hundred years. The scale of this transition won't allow that.” We're headed towards an urban planet no matter what, but whether it becomes heaven or hell is up to us.

    The word “pub” is short for public house. There are around 60,000 pubs in the U.K. One of the oldest pubs, Fighting Cocks in St. Albans, Herts, is located in a building that dates back to the eleventh century.

    {#blank#}1{#/blank#} People talk, eat, drink, meet their friends and relax there. Pubs often have tow bars, one usually quieter than the other, and many have a garden where people can sit in summer.{#blank#}2{#/blank#}

    Groups of friends normally buy “rounds” of drinks.{#blank#}3{#/blank#}It is sometimes difficult to get served when pubs are busy: the bar staff will usually try and serve those who have been waiting the longest at the bar first.

    Most pubs offer a complete range of beers, local and imported, with German, Belgian and French beers being in demand.{#blank#}4{#/blank#}As a matter of fact, pubs sell soft drinks, too.

    The legal age to purchase alcohol is 18 in the U.K.{#blank#}5{#/blank#}But they must be with an adult and the adult orders it.

    It is illegal to sell alcohol to someone who already appears drunk. Fourteen-year-olds may enter a pub unaccompanied by adults if they order a meal. Children may enter a pub with their parents until 9 p.m., which lets families enjoy reasonably priced pub meals together. And it also allows pubs to play their traditional roles as community centers. Customs in British pubs differ from those in American bars. In most pubs in the U.K., you must go to the bar to order drinks and food and pay for your purchases immediately.

A. Most people might think pubs are places where people simply drink alcohol.

B. The person whose turn it is will buy drinks for all the members of the group.

C. People aged 16 and 17, with the license's permission, may have only one glass of wine during a meal.

D. In the salon bar the atmosphere is quieter and there are fewer people.

E. Children can go into pub gardens with their parents.

F. Pubs are an important part of British life.

G. British people like drinking beers in pubs.

Dear James,

    It is a beautiful day here and I am sitting under the big tree at the end of the garden. I have just returned from a long bike ride to an old castle. It seems amazing that at my age I am still fit enough to cycle 20 kilometres in an afternoon. It's my birthday in two weeks' time and I'll be 82 years old! I think my long and active life must be due to the healthy life I live.

    This brings me to the real reason for my letter, my dear grandson. Your mother tells me that you started smoking some time ago and now your are finding it difficult to give it up. Believe me, I know how easy it is to begin smoking and how tough it is to stop. You see, during adolescence I also smoked and became addicted to cigarettes.

    By the way, did you know that this is because you become addicted in three different ways? First, you can become physically addicted to nicotine（尼古丁）, which is one of the hundreds of chemical in cigarettes. This means that after a while your body becomes accustomed to having nicotine in it. So when the drug leaves your body, you get withdrawal symptoms. Secondly, you become addicted through habit. As you know, if you do the same thing over and over again, you begin to do it automatically. Lastly, you can become mentally addicted. I believed I was happier and more relaxed after having a cigarette, so I began to think that I could only feel good when I smoked. Quitting smoking was really difficult because I was addicted in all three ways. But I did finally manage.

    When I was young, I didn't know much about the harmful effects of smoking. I didn't know, for example, that it could do terrible damage to your heart and lungs or that it was more difficult for smoking couples to become pregnant. Neither did I know that my cigarette smoke could affect the health of non-smokers. However, what I did know was that my girlfriend thought I smelt terrible. She told me that she wouldn't go out with me again unless I stopped! I also noticed that I became breathless quickly, and that I wasn't enjoying sport as much. When I was taken off the school football team because I was unfit, I knew it was time to quit smoking.

    I am sending you some advice I found on the internet. It might help you to stop and strengthen your resolve. I do hope so because I want you to live as long and healthy a life as I have.

Love from

Grandpa