Red, green, blue, black and white are basic(基本的) colours.

    The world is colourful(多彩的). The sea is blue. The grass is green. Most countries in the world like green because it's a symbol(象征) of life(生命)，but people from England and Japan don't like it. Red is a popular(流行的) colour in China, but in Thailand(泰国)，it is bad to write names in red ink(墨水). It means someone is dead(死亡的). In Australia, people think the black cat can bring them good luck, but in America, people think the white cat is a lucky cat.

    We have to be fit, no matter (不管) what age we are. It's very important for kids. That's w{#blank#}1{#/blank#} they have P.E. class.

    In Britain students have two hours of P.E. each week. P.E. includes sit-ups, press-ups (俯卧撑) and skipping rope.

    Students also p{#blank#}2{#/blank#}football, basketball and cross-country running. In summer kids run and do the high and long jumps.

    When I was at school my favourite was trampoline(蹦床). Jumping high into the air always made me excited. But you need to be c{#blank#}3{#/blank#}. Sometimes you don't land where you planned!

    When you get your report card there will be a grade for P.E.. Your parents will see how good you are a{#blank#}4{#/blank#} push-ups, as well as maths. But the grade for P.E. doesn't affect (影响) your chances of g{#blank#}5{#/blank#} into a good school.

    Do you know what makes lightning (闪电)? {#blank#}1{#/blank#}

    Lightning strikes happen when ice and water in clouds rub (摩擦) together, and cause atmospheric (大气层的) changes. When this happens, it creates a static charge (静电). Lightning can strike inside the cloud, between two clouds or between a cloud and the earth. {#blank#}2{#/blank#}

    Lightning can be very dangerous. Every year, lightning kills people because it can start big fires or because it reaches a temperature of 28,000℃. About 1,000 people are hit by lightning every year in the United States, and about 100 of them die as a result.

    {#blank#}3{#/blank#}Scientists think that there are more than three million lightning strikes every day in the world. An American man, Roy Sullivan, who worked in a park, survived from the most lightning strikes. {#blank#}4{#/blank#}And he keeps the highest world record.

    Lightning is sure not something to play with. When lightning strikes, it's best to stay inside a large building. {#blank#}5{#/blank#}Also, do not lie down on the ground, or the electricity may go through you and cause a heart problem.

    You either have it, or you don't—a sense of1that is. But2is it that some people could find their way across the Sahara without a map, while others can3themselves in the next street?

    Scientists say were all4with a sense of direction, but it is not properly understood how it works. One theory is that people with a good sense of direction have worked hard at5it. Research being carried out at Liverpool University supports this idea and suggests that if we don't use it, we lose it.

    Children as young as seven have the ability to find their way6,"says Jim Martland, Research Director of the project. "However,7they are not allowed out alone or are taken everywhere by car, they will8develop the skills. ”

    Jim Martland also emphasizes that young people should be taught certain9to improve their sense of direction. He makes the following suggestions:

    If you are using a map, turn it so that it10to the way you are facing

    If you leave your bike in a strange place, put it near11like a big stone or a tree. Note landmarks on the route as you go away from your bike. When you return, go back along the12route.

    Simplify the way of finding your direction by using lines such as streets in a town, streams, or walls in the countryside to guide you. 13your steps 14you know how far you have gone and note any landmarks such as tower blocks or hills which can help to find out were you are.

    Now you will never get lost15!

Many social media posts(社交媒体帖子) may let you believe that everyone is happy all the time, but being happy all the time is not possible.

As a teenager, you probably expected to get good grades in an exam or to win the most important basketball game, but it didn't happen. Good results make you happy and bad results make you sad. But sadness can drive you to improve yourself next time.

However, when people get into sadness for a long time and it starts to affect(影响) their lives, it's called depression (抑郁). You don't want to get out of bed. You don't feel like studýing or going out with your friends. I remember the same feeling when my dog Rebel died in an accident. I remember that he followed me to school. Now he was gone, and I lost all interests to do anything.

My parents told me dogs don't live forever. What was more, Rebel had a good life. If Ihad a good life, Rebel must be happy, too.

Depression is not a person's mistake. It's normal to feel sad sometimes. Many great people, like the comedy actor Jim Carrey, once get depressed. But you should know what to do to stop depression or make yourself less depressed.

When you feel down, you must not keep yourself away from the world. Try to share your feelings with a family member or a good friend. Staying at home by yourself will make you more lonely. You should stand up, open the window, and throw away (抛弃) the sadness.