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.

Here are some simple ways to stay healthy..

●Breathe fresh air. Gettingfresh air outdoors is an important health benefit but it is often overlooked (忽视). Try to spend at least a few minutes outdoors every day: take awalk or plan outdoor activities.

●Drink more water. Try todrink 6-8 glasses of water every day, besides coffee, tea, and soft drinks.

●Sleep 6-7 hours every night.Getting a good night's sleep is necessary to good health, and it is also importantto get the right amount of sleep. Researchers have found that people need tosleep 6-7 hours a night.

●Eat fruit and vegetables. Mealseaten at home have more fruit and vegetables than those eaten in restaurants. Sotry eating more meals at home, and when going out, try to take some fruit withyou,

●Exercise daily. Researchersare finding that exercise plays a huge part in overall health. Doing exercise regularlyis much more likely to lead you to healthier lives than not doing exercise.

Today's teens have grown up online. {#blank#}1{#/blank#} They do homework online. And surely they get their news online. But because they are so comfortable with the Internet, they seldom question the news stories online. 

Now William Colglazier, a history teacher at a high school in America, is teaching his students how to think critically (批判性地) about online information and recognize a fake (假的) news story. 

His idea came from a study on people's online reasoning (推理) at Stanford University. {#blank#}2{#/blank#} Most middle school students in the study could not tell the difference between an advertisement and a news story, and high school and college students fully trusted the websites ending in ".org". 

The good news is that, according to Colglazier, once teens realize they've been cheated, they have strong will to tell truth from lies. "{#blank#}3{#/blank#} and how to recognize when others use poor argumentation (论据)," he said. Some of the advice that Colglazier offers his students includes moving off the site to find more information about the site, the writer's motivations (动机) and the organization behind the news story. 

{#blank#}4{#/blank#} He hopes more kids would think critically when they read news online. "{#blank#}5{#/blank#}" he said. "If people can't tell real news from fake news, the results can be frightening."

A．The Internet is both beautiful and ugly.

B．They make friends online.

C．The study found that young people lack ability to tell truth from lies.

D．The study found that young people lack ability to reason about the information on the Internet.

E．The Internet is between beautiful and ugly,

F．Colglazier shared some of his courses with other teens in Teen Vogue.

G．But they need some advice on how to find evidence (证据).

A good breakfast is very important. You will understand it. By breakfast time you have not eaten anything for twelve hours. Your body needs energy for morning activities(活动). One good breakfast can serve enough energy. It should be rice or bread, an egg. milk and fruit. On a cold morning, a cup of hot milk is necessary(必需的). A good breakfast helps you to smile more easily. It helps you to be more friendly and also to work better and play more happily. Your whole day will be more fun after you have enjoyed a good breakfast.

28th July, 1973, is a big day for fish. Two little mummichogs(花鳉) became the first fish in space. They lived in a plastic bag aboard Skylab. Three weeks later, they learned how to swim in zero gravity(零重力).

51 years later, four zebrafish are now swimming aboard China's Tiangong Space Station. This is for a space experiment to see how very little gravity changes how fish live and grow.

 We know people feel weightless in space. But very little gravity can cause more changes. It affects almost all our body activities. If we' re going to live more in space in the future, we need to understand these changes. People are hard to study though. So, scientists study fish instead.

 Zebrafish have helped us learn about living things. They may seem different, but have many similar body parts with us. "Their bodies often work like ours," explains Aaron van Loon, a biologist at the University of Washington.

 Zebrafish are also small and easy to take care of. And, they' re clear before they are born. Scientists can look inside them while they' re growing.

 Zebrafish have been in many medical studies. In space too, they' re studied since the 1970s. In 2015, zebrafish on the International Space Station helped learn how muscles get weak in very little gravity.

 Like astronauts, fish are carefully picked for space trips. They always have a job to do. Our little friends in water are helping us learn to travel in space safely.