If you get injured in a sport, what should you do? The best way     1    (deal) with sport injuries is to keep them from     2    (happen) in the first place. Knowing the rules of the game and using right     3    (equip) can help you avoid injuries. If you’ve got injured, pull     4    (you) out of the game or stop doing your activity. Let your coach or parents know what has happened in case you need to see a doctor. Serious head and neck injuries happen most often to the athletes     5     play sports like football. Keep the injured person still with his or her head     6    (hold) straight while someone calls for medical help. If the person     7    (lie) on the ground, do not try to move him or her.

Your first question after a sport injury will     8    (probable) be, “When can I play again?” This depends on the injury and     9     your doctor tells you. Even if you can’t return to your sport right away, the doctor might have advice on what you can do to stay healthy. Always talk with your doctor     10     trying any activity following an injury.

5 . It was the final part of the 2016 World Triathlon(铁人三项)Series in Mexico.With just 700 meters 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.Despite 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 varied 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: “Mum 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.

6 . After graduation, I decided to take the gym seriously. Accompanied by a friend, I _________ a routine of walking on the treadmill(跑步机). I was _________ with our routine in the gym. My friend, however, became bored.

One day, he suggested that we _________ an outdoor sport. I was an uncoordinated (动作不协调的)person, so I _________ his proposal.

But several weeks later, he managed to _________ me to step onto an outdoor racquetball (美式壁球)court. When I hit the ball, I sent it flying in every direction except the direction that I had _________. Still, somehow, I tried hard to learn it and became _________ after constantly practicing.

“We’re not getting enough _________ on the treadmill. Why not play tennis to build up our body?” suggested my friend.

“Tennis? I can’t play tennis! That _________ real skills!” I firmly resisted his new __________.

Nevertheless, weeks later, I started playing tennis. After several months of painful practice, one day, as the ball came flying towards me, my racket and the ball met in what tennis players __________ as the “sweet spot”. I had __________learned how to play tennis properly!

I learned an extremely valuable __________ from these experiences: I can do whatever I set my mind on. I just need to put in efforts, and the results will __________. And I become quite __________ about trying new things and I’m always filled with a sense of excitement.

8 . It can be incredibly difficult to encourage ourselves to go for a run during winter, particularly when it’s wet and windy outside. But new research has found that even a super-quick run could have great health benefits. In fact, it seems that just a 10-minute session will not only make us feel better, but could actually improve brain health, too. Now, we all know that exercise can improve mental and physical health in many ways.

But when it comes to mental well-being, there’s been relatively little research done on the specific benefits of running, compared with other physical activities, such as cycling. So this was something put to the test during a recent study. Researchers from University of Tsukuba in Japan asked participants (参加者) to run on a treadmill (跑步机) for just 10 minutes. They then had to take a Stroop Color and Word Test which is used to measure reaction time in brain processing. Results showed there was a highest point in self-reported pleasure and an increase in degree of activity of the brain.

In other words, runners were found to have an increase in blood flow in the part of the brain that’s associated with dealing with functions and controlling mood (情绪). Researchers then compared these results to a similar study on cycling, which also showed improved cognition (认知), but no mood improvement. Therefore, it seems various types of exercise can make us feel differently.

The authors noted, “Given exercise is medicine, the effects of drugs differ depending on the type of drug, and different types of exercise such as running and cycling should be observed to have different effects on mental health and brain functions as well.”

So pushing ourselves to get outside for a run really will make us feel better, probably more than other fitness activities. And these findings show that we don’t necessarily need to do a lot of exercise to feel the benefit of it.

9 . In the Beijing Winter Olympics, we were treated to incredible displays of athletic talents ascompetitors took to the snow and ice. As a popular sport at the Winter Olympics, ski jumping is oneof the best examples to showcase the “superhuman” power of athletes.

Ski jumpers soar into the air and appear to be almost flying in the sky. How do they achieve this? Physics call offer us an explanation of how they make it. It involves the use of the laws of aerodynamics(空气动力学)to fight against gravity and increase lift while reducing drag.

To understand how ski jumping works, we need to consider three elements: gravity, lift and drag. Gravity is the force that pulls us towards an object. Lift occurs when an object is moving through the air—as its surface comes into contact with air particles(微粒), the particles are pushed down and away from the object, allowing it to move up. At the same time, this interaction createsdrag, and slows down an object’s movement.

While there is nothing that the skiers can do about gravity, they can twist their bodies into positions to allow them to achieve greater lift and avoid as much drag as possible. According to the Smithsonian Magazine, “To do this, athletes try their best to make their skis and body nearly parallel to the ground and place their skis in a V-shape just outside the form of the body. This position increases the surface area that produces lift and puts them in the ideal angle that will also maximize(最大化)lift.”

Because of how the sport works, athletes’ equipment is strictly controlled according to weight and height in order to avoid any unfair advantages. This means suits must be tight in order to ensure athletes cannot use them as a way to gain more lift. For athletes, minor day-to-day waterweight changes as little as 300 grams. It can mean that suits will not be tight enough according to their body mass indexes(体重指数).