Playing sports has a lot of benefits(好处). It can help you build a strong body and keep you in good health. But some students don't like sports because they don't know how to play them. Many sports have a lot of rules. To play some sports well, people have to spend many years doing a lot of training(训练). So don't feel sad if you don't know how to play them. What should you do if you want to learn about some sports？ Firstly, you can watch DVDs or read some books that explain(解释) the rules of playing the sports. You can also ask your parents to explain the rules to you. If you know more about these sports, it will be easier for you to practice them. And if you want to find the one you like best, you should try different kinds of sports.

根据短文内容，补全表格中所缺的信息。每空不超过5个词。

    What Is It?

    The newly app(应用程序)“ Limited Screen Time” designed by Thomas Black Company is coming out today. “Limited Screen Time” is a simple app that allows you to set limits on the time your children use an iPhone or iPad.

Background

    Parents are worried about the length of time that today's children spend on screen. And long screen time is one of the reasons why kids are short-sighted. " Limited Screen Time" is a simple way to help set and control limits to your children's time with an iPhone and iPad.

    How Does It Work?

    Step One: use your finger across the clock to set the time

    Step Two set the user by typing on the "Users”

    Step Three: press "Start”

    Step Four: pass your iPhone or iPad to your child and let them use the phone any way you choose.(e. g apps, Movies, music)

    What Happens Next?

    After your set the time, the device(装置) will receive a set of messages alerting(警告) your children that“ Your screen time is up", Your children will be unable to continue using the phone until the passcode is correctly entered.

Graphs(曲线图)

    From the graphs you can see the weekly length of screen time

Information Card

    Which meal do we need most, breakfast, lunch or dinner? Dinner is a big meal of the day, but it is not the meal we need most. Breakfast is the meal we need most, because from night to the next morning is a long time to go without food. We may feel hungry or sick if we have no breakfast.

    How many times a day should children eat? Most people eat three meals a day  but five times a day is fine for children. Children are always hungry after school. They should have a snack then. Then they will not eat too fast at dinner because eating too fast is not good. They should also have an apple or an orange between lessons. They are growing. They need to eat often.

    Is it right to eat much when we get tired? It is not good to eat too much. It can make you sick. Wait until(直到)you are rested. Then your food will do you better.

    We can talk about interesting things at the table but we should talk quietly. If we are glad, our food does us better.

Huge Waves Destroying Arctic Ice Faster than Expected

    Ice covers much of the Arctic Ocean (北冰洋). Some pieces of ice are huge, like moving islands. As temperatures have increased, however, some of the ice has begun to disappear. Scientists have discovered huge waves (海浪) in the arctic waters.

    The waves were discovered by accident in May, 2010. Scientist Aleksey Marchenko and his students set out on a trip. They wanted to study the icy waters.

    On May 2, the ship traveled east and stopped next to a large chunk of ice around 50 miles from the small island of Hopen. Marchenko prepared to lead his students out onto the ice.

    "We were ready to go but when I went out, I discovered many cracks (裂缝) around," he remembers.

    He decided to move the ship deeper into the ice to keep safe. The farther in they went, he thought, the harder the ice would become. As they pushed forward, however, the ship experienced small waves, and then bigger ones. Soon, the waves broke up the ice around the ship into thousands of smaller pieces.

    Within an hour, Marchenko and his team saw a wave that was about 13 feet high. The ship's navigation (航行) system finally recorded the largest waves. They were more than 20 feet in height. The waves were so strong that they forced huge pieces of ice to jump up and down, breaking the ice into smaller pieces within just one hour. Scientists had never imagined that the process could happen so fast. The waves in these areas used to be small.

    The speed and force of the huge waves there makes it impossible to know in advance when they are coming. That could be dangerous for navigators and local communities who are unprepared for huge waves or depend on sea ice to protect them. Wildlife like polar bears and walruses that depend on sea ice to live is also in danger.

    Some scientists think people will soon see even bigger waves in these icy waters. As waves break up ice, the seas will become more open, and the waves will get even stronger. There are stormy times ahead.

    Many people are looking for a pet that is a little more interesting than a cat or a dog. If you have a lot of space and are happy to find out how to look after it, a green iguana(蜥蜴) can make a great pet. We spoke to Dr. Troy Wilson, a specialist in lizards, about how to look after an iguana.

    The first question is, what should it live in?

    Dr. Wilson: The green iguana can grow to be about 2 meters long, so you are going to need a big space to keep it in. Start with a small glass tank for a baby iguana, then when it is bigger, you can move it into a larger cage.

    Do they need water?

    Dr. Wilson: Yes. Iguanas need water to drink and sit in. In the wild they always live near water and they are good swimmers. They need a water dish or small pond that is big enough for them to sit in.

    What do they eat?

    Dr. Wilson: They eat mostly raw vegetables and some fruit. You can feed your iguana fresh vegetables every day and some fruit once a week. Iguanas cannot chew their food so you should cut it into the right size. They swallow food in one piece.

    Are they fun?

    Dr. Wilson: An Iguana is a clever, friendly animal. It will learn who you are and can even be quite affectionate. (深情的)