We usually believe what our brain tells us, but there are some amazing facts which show that the brain tricks us. As a result, we think we can see something that is not actually there or we ignore（忽视）things that actually are there.

 Scientists Daniel Simons and Christopher Chabris have researched this phenomenon（现象）, which they call “change blindness”. Their experiments show how we sometimes just do not see what is in front of our eyes because           42          .

 Here is one of their most famous experiments. In this experiment, the participants（参与者）were shown a video of two groups of people (one group in white T-shirts and one group in black T-shirts) who passed basketballs around in a hallway. Each group had three members. Simons and Chabris asked the participants to count how many times the white team passed the ball. While the two teams were passing their balls around, a person dressed up as a big bear walked through the group and stopped to look at the camera. Simons and Chabris found that about half of the research participants did not notice the big bear.

    Read the questions and answer YES or NO, then you will find out how good you are.

⒈When you don't understand something, you ask questions.

⒉You like listening to older people talk about the past.

⒊You think that you can learn something interesting from everyone around you.

⒋You are brave enough when you have to talk to people you don't know.

⒌You enjoy reading books about famous people.

⒍You always see and talk to different people.

⒎You are interested in learning new ways of doing things.

⒏You enjoy sharing experiences with friends and learning from people of all ages.

⒐You talk a lot about yourself.

⒑Even if you are often wrong, you make your own decisions.

⒒You hate teaching what you are good at: sports, technology and so on.

⒓Your parents don't understand you, so you don't talk to them much.

Score Now! (开始计分 )

    Score2 points if you answer YES to each of the first 8 questions, and 0 if you choose NO.

    Score 2 points if you answer NO to each of the last 4 question, and 0 if you choose YES.

    18-24. You are friendly and open-mind. You make people feel important by listening to what they have to say. You'll probably succeed in learning all kinds of interesting things.

    10-16. Remember that every single person you know can teach you something. You will great make your life rich and colorful.

    0-8 About 400 years ago, a famous writer wrote, “No man is an island.” This is still true today. Try to be more open and interested in people around you.

    In most parts of the world, many students help their schools make less pollution. They join environment clubs. In an environment club, people work together to make our environment clean.

    Here are some things students often do.

    No-garbage lunches. How many lunch bags do you throw away after lunch? Environment clubs ask students to bring their lunches in bags that can be used again. Every week they will choose the classes that make the least garbage and report them to the whole school.

    No-car day. On a no-car day, nobody comes to school in a car including the students and the teachers. Cars give pollution to us, so remember：

    Walk, jump, bike, or run!

    Use your legs! It's lots of fun!

    Turn off the water! Do you know that some toilets can waste twenty to forty cubic meters of water an hour? In a year, that would fill in a small river. In the environment clubs, students mend those broken toilets.

    We love our environment. Let's work together to make it better.

    Some people seem to have unusual memories. Zheng Aiqiang, a "memory athlete" on TV show Super Brain, can remember 2,660 numbers in just one hour!

    You would think people like him must have special brains. But according to a recent study by researchers from America and Holland, the brain structure (结构) of ordinary people and 23 of the world's leading memory athletes shows no difference.

    Good memories can be trained. New research in the magazine Neuron suggests that a person will get a super memory with just six weeks of hard training.

    Researchers found that a technique (技巧) called loci, invented by the ancient Greeks, can greatly help improve memory.

    By using loci, you are using your imagination to improve the brain's memory networks. You can link (关联) something you need to remember with a place that you know very well. For example, to remember a list of numbers, imagine yourself walking through your house. Each thing is linked to a number. For example, zero could be the handle on the door and five could be the painting on the wall.

    In one study, some ordinary people were given 20 minutes to remember 72 nouns. At the beginning, they could only remember 26 words, but when they were taught loci, they could remember 62 words.

"Not everyone can become a memory winner. But everyone using the technique can improve his memory greatly," said Boris Konrad, one of the researchers in the study.

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