Sharks have been around for a very long time. It means that they have been on earth for thousands of years, and have changed little. A shark is a fish, but it has many {#blank#}1{#/blank#} from a fish. For example, if a shark {#blank#}2{#/blank#} swimming, it will sink(下沉).

    There are {#blank#}3{#/blank#} 200 and 250 kinds of sharks in different size. The largest can be {#blank#}4{#/blank#} long as 15 meters. Sharks feed on fish, {#blank#}5{#/blank#} sea animals, or smaller sharks. It is said that one of the most {#blank#}6{#/blank#} sharks is the Great White Shark. They have attacked(攻击) a number of people off the beaches of America. Australia, New Zealand and South Africa also have shark 0attacks. In some places there {#blank#}7{#/blank#}watchtowers on the beach to warn people about sharks in the water. {#blank#}8{#/blank#} a shark appears, a bell rings to tell people to get out of the water. Shark attack about 100 people a year in America. Perhaps the shark {#blank#}9{#/blank#}thinks that the people is a kind of sea animal, or {#blank#}10{#/blank#} good to eat.

    What will life be like after 200 years? Teachers won't{#blank#}1{#/blank#}on the blackboard with{#blank#}2{#/blank#}in the future. Students won't do their homework on{#blank#}3{#/blank#}, and we won't draw a line (线) with a {#blank#}4{#/blank#}. At that time, every student will study {#blank#}5{#/blank#}the computers.

    Ever since his new movie Guardians of the Galaxy(《银河护卫队》became a hot topic at the box office, Chris Pratt has become{#blank#}1{#/blank#}around the world. But do you know that the actor comes from a poor family? His road to fame has not been easy. After{#blank#}2{#/blank#}high school, Chris attended college. However, his time as a college student was short. He dropped out(辍学) one year later. Then, he made a living with different kinds of jobs, {#blank#}3{#/blank#}a salesman and a restaurant waiter. For a short time, he was homeless and slept on the{#blank#}4{#/blank#}.