4 . It was the final part of the 2016 World Triathlon (铁人三项) Series in Mexico. With just 700 metres to go, Alistair Brownlee was in third place and his younger brother Jonny, was in the lead. Alistair pushed himself towards the finish line in the burning heat, but as he came round the corner, he saw his brother about to fall onto the track. Alistair had to choose brotherly love, or a chance to win the race.

For Alistair, the choice was clear. His brother was in trouble. He had to help. Alistair ran towards Jonny, caught him and started pulling him towards the finish line. Alistair then pushed his brother over the line. The move put Jonny in second place and Alistair himself in third. It was an unexpected end to the race, but Alistair did not want to discuss it with the media. He just wanted to see his younger brother, who had been rushed to the medical area.

The Brownlee brothers have been doing triathlons since they were children. “Obviously, when your older brother is doing it, you think it’s a cool thing to do,” says Jonny. Alistair says that they encourage each other as much as they can when they train. Though there are arguments over “stupid things” now and then, Alistair agrees that having a brother is an advantage. “Throughout my entire life, I’ve had my brother trying to beat me at everything I do. It has been a fantastic driving force.”

Watched by millions, the ending to the race has different opinions: should the brothers have been disqualified (取消资格) or highly praised for their actions? But for Alistair, his decision was easy to explain:“Mun wouldn’t have been happy if I’d left Jonny behind.” At that moment, he was no longer an athlete aiming for a medal——he was just a brother.

5 . Skin-diving (潜泳) is a new sport today. This sport takes you into a wonderful new world. It is like a visit to the moon. When you are under water, it is easy for you to climb big rocks because you are no longer heavy.

Here, under water, everything is blue and green. During the day, there is plenty of light. When fish swim nearby, you can catch them with your hands.

When you have tanks (罐) of air on your back, you can stay in deep water for a long time. But you must be careful when you dive in deep water.

To catch fish is one of the most interesting parts of this sport. Besides, there are more uses for skin-diving. You can clean ships without taking them out of water. You can get many things from the deep sea.

Now you see that skin -diving is both useful and interesting.

8 . Losing weight is difficult. For most people, it requires a change in diet, a change in exercise habits, and a change in attitude.    1    

●Set healthy goals.

If you’re overweight and want to change that, the first step is deciding what your target weight is.    2    

●Start small.

Making big behavior changes isn’t something that happens overnight.    3     Keep eating 5 servings of vegetables a day, exercise 2 days a week for the first week, and then add a little more each week.

●    4    

The best way to stick to your diet and exercise rues is to track it. There are plenty of apps that allow you to do this. Or you can do it in an old way and keep a written food and exercise journal. Find what works for you and write down what you’ve achieved every day.

● Evaluate (评估) and adjust.

Every month you should take a look at your goal and see the progress you’ve made towards achieving it.    5     Try doing different exercises or cutting out some foods that you may be eating too much. Losing weight and keeping it off is a highly personal thing for you. Only you can find what just works for yourself and stick with it.

9 . Teenagers’ fitness is now a major concern，and physical exercise is very important. It reduces stress and improves fitness. Exercise makes your body strong，and helps you to keep the right body weight. Sports scientist Dr. Helen Lopez offers the following advice to teenagers：“First，you need to find out your present level of fitness. Then you can design a programme that will help you become healthier.”

Dr. Lopez suggests that there are three levels of fitness that need a change of lifestyle.“Overweight”means that the person gets very little exercise and often has a serious weight problem. “Inactive” means that the person does not join in many physical activities，but is not seriously overweight.“Active”refers to people who take part in sports and other physical activities，but do not have a high fitness level.

According to Dr. Lopez，overweight teenagers should work out to keep healthy.“Ride a bike，play volleyball or basketball for a while，and go for a twenty­minute walk each day. All these will help to burn calories.”Inactive teenagers should do similar activities, but add some bending and stretching exercises, such as push­ups and sit­ups, starting with twenty of each a day.“Inactive people can take a little more exercise than overweight people because their bodies are stronger，”Dr. Lopez said. The same rule applies to active teenagers.

Dr. Lopez suggests one hour a week or more on running and other forms of intensive exercise，together with fifteen minutes a day spent on stretching and bending activities.“These are really important in order to prevent injuries,” Dr. Lopez said. Some weight­training and other body­strengthening exercises could also be planned in the programme in order to increase the person’s strength.

10 . All over the world people enjoy sports. Sports help to keep people healthy and happy, and to live longer.     1    They buy tickets or turn on their TVs to watch the games. Often they get very excited when their player or team wins.

    2    Football, for example, has spread around the world. Swimming is popular in all countries near the sea or in those with many rivers. What fun it is to jump into a pool or lake, whether in China, Egypt or Italy!     3    Think how many lovers to skate or ski in Japan, Norway or Canada.

Some sports or game go back thousands of years, like running or jumping. Chinese Kungfu, for example, has a very long history. But basketball and volleyball are rather new. Neither one is a hundred years old yet.     4    Water-skiing is one of the newest in the family of sports.

People from different countries may not be able to understand each other, but after a game together they often become good friends.     5    One learns to fight hard but fight fair, to win without pride and to lose with grace.