27 world records were broken during the 2016 Summer Olympics. They fell in swimming running weightlifting and a number of other sports. But how do athletes continue to get better, jump longer, run or swim faster? Although scientists say that athletes have reached their limits (极限), records continue to fall. In almost every sport, athletes have become better since the Olympic Games begin.

    One reason is that and more people than ever before have access to sports and exercise. They start at an earlier age and can compete longer in their sport. In schools more and more natural talents can be discovered.

    Besides, athletes can train full-time instead of training after works. As medicine improves, athletes can stay in competition for a longer time and overcome injuries (损伤) faster. Many top athletes achieve their best results later on in their careers. Technology has also helped improve scores.

    One of the most important reasons, however, is the human mind. We always want to be better and faster that someone else. It can release (释放) great power in our body.

    So, where are limits? One of the most difficult questions to answer is how fast a human being can run. Many years ago, nobody thought a person could ever run within 10 seconds in the 100-metre race. But the record was broken at the 1968 Mexico City Olympics. A t the moment Sustain Bolt is the fastest man on Earth at 9.58 seconds. Scientists say that 9.48 may be the limit, but, who knows, maybe some runners will one day run within 9 seconds.

    How green are you? Do you know how to be green?

    We all need a healthy environment, but we produce waste every day and it does harm to our environment.Though we are young, we can still do something to help. In fact, even the simplest everyday activities can make a real difference to the environment.Here are some ideas for you.

Reduce

    Reduce means “use less”.Don't waste things.This saves money and reduces pollution and waste going into the environment.Before we buy something new, think whether it is really neces sary or maybe the old one will be just as good! When we do buy things, choose local products if possible, and try not to buy too many things from abroad.

Reuse

    Reuse means "use again".Use things for as long as possible.When we buy things, make sure that they can last a long time.We should look after them so that they will last, and we should repair them if we can instead of throwing them away and buying new ones.Don't use a paper cup or a paper bag.It's better to use a china cup and a lunch box because you can use them again.

Recycle

    Recycle means “change things into something else”.Though it takes energy to change something into something else, it's better than throwing things away or burning them.Find out what can be recycled in your neighborhood and take part in the recycling program.We should also buy products made from recycled materials,such as recycled paper, to help save trees.

    So please remember three words: reduce, reuse and recycle.

I'm Mary from England. Now I'm in a middle school in Beijing. I'm in Class 5, Grade 7. Look! This is a photo of our classroom. There are twenty-one desks and forty chairs in it. Two students share a desk. And there is also a desk for our teachers in the front of the classroom.

Our classroom is big and tidy. There are two maps in the classroom. They are a map of China and a map of Beijing. There are no computers in the classroom. But there is a bookcase (书架).There are many books in it. We can read them, but we can only take one book at a time. There are only a few books on our desks. Most of our books are in our desks. We like our classroom very much. What about yours?

At school, students learn some different subjects in the classroom. These days, a new subject becomes popular. That is school gardening. Students learn it outside the classroom.

      ▲      . Some teachers, however, are finding good ways to make it work. The school garden may be very small. However, students can have a lot of fun in it. At first, teachers decide(决定) what vegetables to grow. Then they grow them with students. It is nice for the students to get a tomato, wash it and cat it right in the garden, so tomatoes are their favorites.

Gardening is not only an interesting subject, but also a practical subject for students. It teaches students a lot. Some vegetables are easy to grow, but others need a long time. This can teach students patience(耐心). With gardens, kids get to see a beginning, a middle and an end to their work. When working with others, they can also learn some teamwork(团队合作) skills.

The Best Way to Travel

I did a survey about the best way to travel in my class. Here are the results. 

Thirty- five percent of my classmates like {#blank#}1{#/blank#}(travel) by plane. They choose to take the plane {#blank#}2{#/blank#} it's the fastest way. {#blank#}3{#/blank#}, it's also the most expensive. Forty- five percent of them think the train is their first {#blank#}4{#/blank#} (choose). It's{#blank#}5{#/blank#}(safe) and the most comfortable. Besides, it's the second {#blank#}6{#/blank#}(fast). It usually costs less {#blank#}7{#/blank#} taking the plane. Only twenty percent of them choose the coach {#blank#}8{#/blank#} their best way to travel. It's the cheapest but also {#blank#}9{#/blank#}(slow) way. 

Whatever you choose, safety is always {#blank#}10{#/blank#} (important) thing of all. Do remember that!