Everyone knows that exercise is important. We all need to exercise. There are many ways to exercise. You can walk, run, swim, skate, or play ball games, but you should remember to exercise in the right ways.

        ①    Before you do any exercise, make sure to warm up for at least five minutes. During warming up, you should extend all parts of your body.

        ②      It's best to exercise twice each week. Thirty minutes each time is enough. Try all kinds of things until you find one, two or even three sports that feel right for you.

        ③    There are a lot of equipments (设备) at fitness centers. The equipments will help exercise your arms, legs and other parts of your body to make you fit. Some people buy equipments for their homes. But it is very expensive.

        ④     If you get hurt when you are doing exercise, don't play again until you are well.

A. B. C. D. E.

⑴Have a shower before and after you use the pool. {#blank#}1{#/blank#}

⑵Don't leave money or watches in the changing rooms. Put them in a locker. {#blank#}2{#/blank#}

⑶Children under 14 can only use the pool with an adult. {#blank#}3{#/blank#}

⑷No diving into the pool. {#blank#}4{#/blank#}

⑸Be careful when you walk around the pool. Don't run. {#blank#}5{#/blank#}

    Yesterday Jack went to a movie with his mother, Mary. There were two movies last night. One was My Father's Birthday. It was a very funny comedy. They both liked it. The actor was Paul Jackson. Jack liked him very much. The other was Black September. It was a thriller. His mother thought it was boring. After that it was ten o'clock. They went home by car. Jack was very happy, because he liked the films and he had a good time. Half an hour later, he went to bed happily. It was a happy Children's Day.

    With their long tusks (象牙), elephants look strong. However, it is this feature that makes the animal endangered. Many of them are killed for their tusks. People make elephant tusks into crafts (工艺品) and jewelry and sell them to rich people.
    But can these priceless body parts grow back? The answer is no, Live Science said. The elephants' tusks are actually part of their teeth. Nearly all African elephants and most male Asian elephants have these long teeth. About one-third of the tusk is in the animal's skull (头骨). The tusk has a nerve (神经) running down its center. This makes it similar to your teeth. Once you lose a tooth, you will never grow a new one.
    Elephants use their tusks to protect themselves, lift things, dig water and gather food. But losing the tusk will not kill them. The way in which they lose the tusk is what matters. Usually, people get tusks by culling (限量捕杀), which means killing old and weak elephants. They also take tusks from the elephants that have died naturally.

    However, these sources aren't enough to keep up with the demand for ivory. Therefore, some poachers (偷猎者) kill healthy elephants and cut their faces open to remove the tusks. About 27,000 elephants are killed by poachers each year, according to National Geographic.
    As a result of poaching, some African elephants gradually evolved (进化) without tusks, which has allowed them to survive. In Mozambique, about 90 percent of African elephants were killed for their tusks and meat from 1975 to 1992, National Geographic reported.
    Scientists found that about a third of younger females—the generation born after 1992—never developed tusks.

    Every morning my father buys a newspaper on his way to work. Every evening my mother looks through magazines at home. And every night, I look at the posters with photos of David Beckham and Yao Ming on my bedroom wall before I go to sleep. {#blank#}1{#/blank#}

    Paper was first created about 2, 000 years ago, and has been made from silk, cotton, bamboo, and, since the 19th century, from wood. {#blank#}2{#/blank#}But in those days, books could only be produced one at a time by hand. As a result, they were expensive and rare. And because there weren't many books, few people learned to read.

    {#blank#}3{#/blank#}When printing was developed greatly at the beginning of the 11th century, books could be produced more quickly and cheaply. {#blank#}4{#/blank#}

    Today information can be received online, downloaded from the Internet rather than found in books, and information can be kept on CD-ROMs or machines such as MP3 players.

    Computers are already used in classrooms, and newspapers and magazines can already be read online. {#blank#}5{#/blank#}No, I don't think the poster about Yao Ming on my bedroom wall will ever be replaced by a two-metre-high computer!