As sea levels climb, even Washington, D. C. could see more frequent and widespread flooding at high tide.

    Strong storms and high winds sometimes bring floods to coastal areas. But cities and towns along the US East Coast are flooding even in calm and sunny weather. Among them is Maryland's capital Annapolis. Tourists there must sometimes walk through water flooding downtown streets surrounding the habor. Sometimes water covers roads in Atlantic City, N. J. Even the yards and basements of coastal homes near New York City sometimes flood.

All are suffering from this trend—normal high tides surpass (超过) a rising sea level.

    Sea levels have climbed, on average, about 20 centimeters (8 inches) over the past 135 years. And a sharp increase in tide flooding is one of the more visible impacts affecting many coastal areas, notes William Sweet, an oceanographer.

    Sweet and his co-workers recently analyzed data from 45 tide gauges (计量表) along the US coasts. These tools record the changing heights of tides as they rise and fall. From these data, Sweet's team calculated the number of : “troublesome floods” in various coastal cities. These floods, Sweet explains, typically occur when water level is about 30 centimeters (1foot) above the historic level of the highest tides. In June 2014, the team reported finding a growing rise in these flooding events.

    In Charleston, S.C. from 1957 to 1963, the city experienced troublesome floods an average of 4. 6 days per year. Bur from 2007 to 2013, the occurring rate of troublesome floods jumped five times. Annapolis city was even more serious. From1957 to 1963，troublesome floods were roughly 3. 8 days per year. From 2007 to 2013, the average was 10 times higher- 39. 3days a year.

    “Over the next few decades, climate change probably drives sea levels even higher,” Sweet says. “So today's flooding problems promise to become only more widespread and frequent.”

    It's 2035. You have a job, a family and you're about 40 years old! Welcome to your future life.

    Getting ready for work, you pause in front of the mirror.

    “Turn red,” you say. Your shirt changes from sky blue to deep red. Tiny preprogrammed electronics(智能电子元件) are re-arranged in your shirt to change its color. Looking into the mirror, you find it hard to believe you're 40. You look much younger.

    With amazing advances in medicine, people in your generation may live to be 150 years old. You're not even middle-aged! As you go into the kitchen and prepare to pour your breakfast cereal into a bowl, you hear, “To lose weight, you shouldn't eat that.” from your shoes. They read the tiny electronic code on the cereal box to find out the nutrition details. You decide to listen to your shoes. “Kitchen, what can I have for breakfast?” A list of possible foods appears on the counter as the kitchen checks its food supplies.

    “Ready for your trip to space?” you ask your son and daughter. In 2005 only specially trained astronauts went into space and very few of them. Today anyone can go to space for day trips or longer vacations. Your best friend even works in space. Handing your children three strawberries each, you add, “The doctor said you need these for space travel.” Thanks to medical advances, vaccination shots(防疫针) are a thing of the past. Ordinary foods contain specific vaccines. With the strawberries in their mouths, the kids head for the front door.

    It's time for you to go to work. Your car checks your fingerprints and unlocks the doors. “My office, Autopilot,” you command. Your car drives itself down the road and moves smoothly into traffic on the highway. You sit back and unroll your e-newspaper. The latest news downloads and fills the viewer. Looking through the pages, you watch the news as video film rather than read it.

    Challenges are regular visitors in our life, and nobody is immune(不受影响)to them. {#blank#}1{#/blank#}However, we can use these challenges to make positive changes in our life. For instance：

    Develop your passion. {#blank#}2{#/blank#} When you are setting your goals, you always want to be passionate about those goals, because if you love what you do, you will be driven by the desire to achieve success.

    {#blank#}3{#/blank#}When you have doubts about yourself, you are doing damage to your progress. Therefore, you are supposed to see yourself as a winner, and trust yourself. Feeding your mind with positives will reinforce your beliefs and sweep any doubts out of your system.

    Track your progress. It is important that you take note of every improvement you make. {#blank#}4{#/blank#} Every step forward will give you a boost, and accelerate your efforts to the achievement of your ultimate goal.

    Learn how to control your emotions. It is important that you use your emotional intelligence when you encounter problems in your life. You are a product of your thoughts and feelings. Any negative emotions that show up can negate(否定)the positive forward movement you enjoyed earlier. So approach any challenge with a positive attitude.  {#blank#}5{#/blank#} Instead, strongly believe that you have all the tools you need in order to make positive changes in your life. It is in your hands to make the changes necessary and to take your life to new heights.

A. Practice makes perfect.

B. Consider confidence as a must for Success.

C. This will motivate you to work even harder.

D. They can make us lose hope and even give up.

E. Don't feel negative when you meet with difficulties.

F. There is nothing to be gained from delaying decisions and thoughts.

G. Having an enthusiasm for something will inspire you to achieve your goals.

    A team of international scientists is due to set off for the world's biggest iceberg in a mission aiming to answer fundamental questions about the impact of climate change in the polar regions. The scientists, led by the British Antarctic Survey (BAS), are trying to reach a newly revealed ecosystem that had been hidden for 120,000 years below the Larsen C ice shelf.

    Last year, part of the Larsen C ice shelf calved (崩解) away, forming a huge iceberg-A68—which is four times bigger than London, and revealing life beneath for the first time. Now scientists say it is a race against time to explore these new ecosystems before they are transformed to the light. Marine biologist Dr Katrin Linse from the BAS is leading the mission.

    "The calving of A68 provides us with a unique opportunity to study marine life as it responds to a huge environment change," she said. "It is important that we get there quickly before the undersea environment changes as sunlight enters the water."

    Professor David Vaughan, science director at the BAs, said, "We need to be bold (大胆的) on this one. Larsen C is a long way south and there's lots of sea ice in the area, but this is important science, so we will try our best to get the team where they need to be. He said climate change had already affected the sea around Antarctica and is warming some coastal waters. "Future warming may make some habitats warm. Where these habitats support unique species that are adapted to love the cold and not the warm, those species are going to either move or die."

    There is growing concern about the possible impact of climate change in the Antarctic. Earlier this month, a report revealed that melting ice sheets in Greenland and Antarctica are speeding up the already fast pace of the sea level rise. The research, published by the National Academies of Science, Engineering and Medicine, said, "At the current rate, the world's ocean will be, on average, at least 60cm higher by the end of the century." However, it found that the process is accelerating, and more than three quarters of the acceleration since 1993 is due to melting ice sheets in Greenland and Antarctica, the study shows.

    "Have a nice day!" may be a pleasant gesture or a meaningless expression. When my friend Maxie says "Have a nice day" with a smile, I know she sincerely cares about what happens to me. I feel loved and secure since another person cares about me and wishes me well.

    "Have a nice day. Next!" This version of expression is spoken by a salesgirl at the supermarket who is rushing me and my groceries out the door. The words come out in the same tone(腔调)with a fixed procedure. They are spoken at me, not to me. Obviously, the concern for my day and everyone else's is the management's attempt to increase the business.

    The expression is one of those behaviors that help people get along with each other. Sometimes it indicates the end of a meeting. As soon as you hear it, you know the meeting is at an end. Sometimes the expression serves us when we don't know what to say." Oh, you just had a tooth out? I'm terribly sorry, but have a nice day."

    The expression can be pleasant. If a stranger says "Have a nice day" to you, you may find it heart-warming because someone you don't know has tried to be nice to you.

    Although the use of the expression is an insincere, meaningless social custom at times, there is nothing wrong with the sentence except that it is a little uninteresting. The salesgirl, the waitress, the teacher, and all the countless others who speak it without thinking may not really care about my day. But in a strange and comfortable way, it's nice to know they care enough to pretend they care when they really don't care all that much. While the expression may not often be sincere, it is always spoken. The point is that people say it all the time when they like.

    How to prepare for an exam is a big question that you always ask yourself. Here are some tips that may help you.

    Never fear or hate exam and be confident.

    Some students study well but still may be much afraid of exams and due to this reason they get upset and won't be able to get marks.{#blank#}1{#/blank#}You have to be confident and it is of great help for you to gain success.

    Prepare a good timetable.

    Prepare a timetable before starting the study.{#blank#}2{#/blank#}Difficult subjects can be given more time and easier ones less, but most importantly you should spare some time for rest.

    Select a proper atmosphere for studying.

    Studying atmosphere plays a very important role.{#blank#}3{#/blank#}So pick a place where you feel comfortable. That is where you feel relaxed and can pay attention to what you are doing. Make sure that while you are studying a subject you are focusing on it only. So keep the books of other subjects away from your eyesight so that you won't be upset about all the things you have to learn.

    Make notes while studying

    This is a very important point. While studying, make small notes. The note should be short and clear to make the review easier.{#blank#}4{#/blank#}Yet don't try to cover everything in it.

    {#blank#}5{#/blank#}

    On the night before exam you have to sleep well, at least 6 hours and not more than 8 hours. Remember this will have a great effect on your exam. And have your food as in your daily diet.

A. Sleep well and eat well.

B. So try to present answers in points.

C. This should include all the subjects.

D. Can anyone study well while others around are watching TV?

E. A good note shall include the most important points.

F. This will be of great use to your coming exams.

G. So leave all your fears and free your mind before starting the study.