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.

    A doctor was teaching some medical students at a famous hospital. A patient {#blank#}1{#/blank#}in, and the doctor asked one of his students, "What's wrong with the man?"

   "I don't know, sir," the student answered." I need to examine him."

   "There's no need{#blank#}2{#/blank#} him," said the doctor." You should know without asking questions. He {#blank#}3{#/blank#} his right knee. Didn't you notice the way he walked? He hurt it by burning it in the fire. You see his trousers leg is burnt away at the knee. It {#blank#}4{#/blank#} Monday morning now. Yesterday was fine, but on Saturday the roads were wet and muddy(泥泞的).  The man fell down on Saturday night."

    The doctor then turned to the man," You had your pay on Saturday and went to a public house and {#blank#}5{#/blank#} too much. You got muddy and wet on the way home. Because you had drunk too much, you fell on the fire and burnt your knee. Is that right?

   "Yes, sir," said the man.

    In our city there is a big {#blank#}1{#/blank#}. There are a lot of {#blank#}2{#/blank#}in it. There are some{#blank#}3{#/blank#} tigers and lions. They like eating  {#blank#}4{#/blank#}and they eat much meat every day.

    There are also two big elephants. Children like to ride {#blank#}5{#/blank#}. The elephants are very{#blank#}6{#/blank#} . They eat lots of grass and bananas.

    In the zoo, we can see many {#blank#}7{#/blank#} of bears(熊), brown bears, black bears and white bears. They are all slow and clumsy(慢而笨拙的). They stand on their back legs(后腿)and lift(举起)their front legs(前腿)to ask for {#blank#}8{#/blank#}. They like cakes very much.

    Do you like pandas? They are a symbol of China now. But there's only {#blank#}9{#/blank#} in the zoo. Her name is Lingling. She is very cute. She {#blank#}10{#/blank#} eating bamboo(竹子)very much. She is kind of shy. She's very interesting and lovely.

    Water is the most important of all the things we eat and drink. Not many people understand this but it's {#blank#}1{#/blank#}true. The human body can go without food for a long time. We've got many examples for this. Yet two or three days without water can usually make people die. Man can't live without water.

    Many people don't understand how much water the human body needs to work{#blank#}2{#/blank#}, and many people, especially young people, do not drink{#blank#}3{#/blank#}, even in very hot weather. Our body has mostly water, about 65% to 75%. That is to say, about two thirds of our body is water. When we do sports, some of the water will get away from our body. If we don't drink some water, we won't have enough water. And if we don't have enough water, we'll feel{#blank#}4{#/blank#}and many of us will get ill. So you know how important water is to us.