One of the most important things in the world is friendship. In order to have friends, you have to be a friend. But how can you be a good friend at school?

    Listen — Listen when they are talking. Don't say anything unless they ask you a question. Sometimes it's not necessary for you to have anything to say; they just need someone to talk to about their feelings.

    Help them — If your friend is ever in need of something, be there to help them. You should try to put them first, but make sure you don't do everything they want you to do. Try to take an extra (额外的) pencil or pen with you to classes in case (以防) they forget one. Have a little extra money in your pocket in case they forget something they need.

    Be there for them — Try to make something for your friend to help make them feel better in hard times. Making cards and encouraging them are among the nicest things you can do for a friend. Marilyn Monroe, a famous U.S. actor, once said, “I often make mistakes. Sometimes I am out of control. But if you can't stay with me at my worst, you are sure not to deserve (值得) to be with me at my best.” Always remember this! If you don't want to stay with your friends when they're in hard times, then you don't deserve to be with them when they're having a good time!

    Try to make plans with your friends. Go shopping, go for ice cream, have a party, go to a movie and so on. Take time to know each other even better by doing something you both enjoy. By planning things together, you both can have a good time. And you'll remember these things when you're all old!

The idea of being able to walk on water has long interested humans greatly. Sadly, biological facts prevent us ever accomplishing such a thing without artificial aid—we simply weigh too much, and all our mass pushes down through our relatively small feet, resulting in a lot of pressure that makes us sink.

    However, several types of animals can walk on water. One of the most interesting is the common basilisk Basilicus basilicus, a lizard (蜥蜴)native to Central and South America. It can run across water for a distance of several meters, avoiding getting wet by rapidly hitting the water's surface with its feet. The lizard will take as many as 20 steps per second to keep moving forward. For humans to do this, we，d need huge feet that we could bring up to our ears in order to create adequate w hitting.

    But fortunately there is an alternative : cornflour. By adding enough of this common thickening agent to water (and it does take a lot), you can create a “non-Newtonian” liquid that doesn't behave like normal water. Now, if the surface of the water is hit hard enough, particles(粒子）in the water group together for a moment to make the surface hard. Move quickly enough and put enough force into each step, and you really can walk across the surface of an adequately thick Liquid of cornflour.

    Fun though all this may sound, it's still rather messy and better read about in theory than carried out in practice. If you must do it, then keep the water wings handy in case you start to sink--and take a shower afterward!

    Shakespeare's Birthplace and Exhibition of Shakespeare's World

    Welcome to the world--famous house where William Shakespeare was born in1564 and where he grew up. The property remained in the ownership of Shakespeare's family until 1806. The House has welcomed visitors traveling from all over the world for over 250 years.

    Enter through the Visitors' Centre and see the highly-praised exhibition Shakespeare's World, a lively and full introduction to the life and work of Shakespeare.

    Stand in the rooms where Shakespeare grew up.

    Discover examples of furniture and needlework from Shakespeare's period.

    Enjoy the traditional English garden, planted with trees and flowers mentioned in the poet's works.

    The Birthplace is within easy walking distance of all the car parks shown on the map, nearest is Windsor Street(3 minutes' Walk)

    The House may present difficulties but the Visitors' Centre, its exhibition and the garden are accessible to wheelchair users.

    The Shakespeare Coffee House (opposite the Birthplace).

    For teenagers, it's great fun to explore new places and it feels like an adventure, even when you know you're not the first to have been there. But to make sure not to get lost or waste time going round in circles, the following tips may be helpful.

    Do the map reading if you're being driven somewhere. It'll be easier if you keep the map following the direction you are traveling in. Keep looking ahead so that you can give the driver lots of warning before having to make a turn, or you'll have to move to the back seat.

    Get a group of friends together and go exploring. You'll need a good map, a compass , a raincoat, a cell phone to call for help in case you get lost, and a bit of spare cash for emergencies .Tell someone where you're going before you set out and let them know what time you expect to be back. The purpose of the activity is in not getting lost, not in seeing how fast you can go, so always stick together, waiting for slower friends to catch up.

    See if your school or a club organizes orienteering（越野识途比赛）activities, in which you need a map and a compass to find your way. This can be done as a sport, with teams trying to find the way from A to B(and B to C, etc. ) in the fastest time, or simply as a spare-time activity. It enables you to be familiar with the use of maps and compass and gain some special skills. In some way, it's not only good fun, but also a great way to keep fit.

    Passenger pigeons (旅鸽) once flew over much of the United States in unbelievable numbers. Written accounts from the 18th and 19th centuries described flocks (群) so large that they darkened the sky for hours.

    It was calculated that when its population reached its highest point, there were more than 3 billion passenger pigeons—a number equal to 24 to 40 percent of the total bird population in the United States, making it perhaps the most abundant bird in the world. Even as late as 1870 when their numbers had already become smaller, a flock believed to be 1 mile wide and 320 miles (about 515 kilometers) long was seen near Cincinnati.

    Sadly the abundance of passenger pigeons may have been their undoing. Where the birds were most abundant, people believed there was an ever-lasting supply and killed them by the thousands.

    Commercial hunters attracted them to small clearings with grain waited until pigeons had settled to feed, then threw large nets over them, taking hundreds at a time. The birds were shipped to large cities and sold in restaurants.

    By the closing decades of the 19th century, the hardwood forests where passenger pigeons nested had been damaged by American's need for wood, which scattered (驱散) the flocks and forced the birds to go farther north, where cold temperatures and storms contributed to their decline. Soon the great flocks were gone, never to be seen again.

    In 1897, the state of Michigan passed a law prohibiting the killing of passenger pigeons but by then, no sizable flocks had been seen in the state for 10 years. The last confirmed wild pigeon in the United States was shot by a boy in Pike County, Ohio, in 1900. For a time, a few birds survived under human care. The last of them, known affectionately as Martha, died at the Cincinnati Zoological Garden on September 1, 1914.

    The world's oceans will likely lose about one-sixth of their fish and other creatures within 100 years if climate change continues on its current path. Every degree Celsius that the world's oceans warm, their biomass is expected to drop five percent, a study found.

    The study predicts that if there is no change in the rate of worldwide greenhouse gas production, there will be a 17-percent loss of biomass by the year 2100. But, if the world reduces carbon pollution, biomass losses could be limited to only about 5 percent.

    Warming temperatures are the biggest issue. But climate change also produces oceans that are more acidic and have less oxygen. This also harms sea life. Much of the world depends on the oceans for food or work.

    The findings make sense and the possible effects of the predicted losses of animal life are huge. "Climate change has the potential to cause serious new conflicts over ocean resource use as the human population continues to grow," said scientists.

    Marine biologist Boris Worm, who helped run the study, added that the "building blocks of marine life—plankton and bacteria—may decline less heavily."

    "Those marine animals that we use directly, and care about most deeply, are predicted to suffer the most," said Worm. He works at Canada's Dalehousie University.

    Scientists had already believed climate change would likely reduce future ocean life. But past computer-based studies looked at only part of the picture or used only one model. The latest study used six different computer models to give the best picture look yet, William Cheung said.

    University of Georgia marine biologist Samantha Joye was not part of the research. But she praised the study as well researched and extremely detailed, and called it "an urgent call for action".