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    All living things, , couldn’t live without air and water. A. though animals and plants B. not only animals but also plants C. whether they are animals or plants D. no matter what they are animals or plants 【查看更多】

     

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    阅读理解

    WHY IS THE SUN IMPORTANT?

    　　The sun is a huge, hot, bright star．It is important because without it there would be no life on the earth．The sun gives us light and heat．

    　　All living things need light and heat from the sun to live．Plants need light and heat to grow．They use the light from the sun to make food．We cannot make our own food, but plants can．All the food we eat comes from plants in a food chain(链)which starts with the sun．For example．

    　　Animals need sunlight, too．Just like us, their food comes from a food chain which begins with the sun and the plants．

    　　sun→leaf→caterpillar(毛虫)→bird

    　　sun→seaweed(海藻)→small fish→whale(鲸)

    　　Sunlight means we can see during the day．If there was no sun, it would be dark all the time．Even when the sky is cloudy, the sunlight is very strong and it shines through the clouds．

    (1)

    Which words tell us what the sun is like?

    [　　]

    A．

    huge

    B．

    hot

    C．

    bright

    D．

    all above

    (2)

    What are the two main things the sun gives us?

    [　　]

    A．

    Light and heat．

    B．

    Heat and eggs．

    C．

    Corn and light．

    D．

    Wheat and bread．

    (3)

    Why can we still see during the day when the sky is cloudy?

    [　　]

    A．

    Because we can see all day and all night．

    B．

    Because the sun can’t give us light all day long．

    C．

    Because the sunlight can shine through the clouds．

    D．

    Because we can’t see at night．

    (4)

    All the food we eat comes from ________．And it starts with the ________．

    [　　]

    A．

    plants; earth

    B．

    a food chain; sun

    C．

    food; sun

    D．

    plants; star

    (5)

    In what way do you think the sun cannot be harmful?

    [　　]

    A．

    The sun can do harm to your eyes and skin．

    B．

    It can make rivers too dry．

    C．

    Without it there would be no life on Earth．

    D．

    Hot sun on dry land can cause fires．

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    阅读理解

    　　All living things must fight to stay alive．They have to feed on something and at the same time avoid being eaten．Therefore they have to solve this big problem of staying alive in their own way．

    　　The danger of being eaten in the sea is great．Those plants and animals that do survive usually reproduce very fast and in great numbers．

    　　Certain sea animals have defensive devices(装置)which help them to survive．The jelly fish have poisonous tentacles(触角)which are used for attack and defence．

    　　Another method of survival which sea plants and animals use is disguise(伪装)．They usually have the same colour as their surroundings．

    　　In order to stay alive, animals need to have good senses．Fishes have sharp eyes．Almost all animals are sensitive to touch．Fishes judge movements in the water by means of their lines．Fishes and other sea animals can hear well and many of them can make different types of warning sound．

    (1)

    What is the greatest problem that the living things face?

    [　　]

    A．

    They have to eat other things．

    B．

    They have to fight not to be eaten．

    C．

    They have to live on in their own way．

    D．

    They have to live in the sea．

    (2)

    How many kinds of animals in the sea have more chances to survive?

    [　　]

    A．

    One．

    B．

    Two．

    C．

    Three．

    D．

    Four．

    (3)

    Jelly fish is an example of animals ________．

    [　　]

    A．

    who can reproduce very fast

    B．

    who can protect themselves from being attacked

    C．

    who can change their colours

    D．

    who have very good senses

    (4)

    Which of the following is NOT mentioned to help animals survive?

    [　　]

    A．

    Sensitive skin．

    B．

    Sharp eyes．

    C．

    Fine smell．

    D．

    Good hearing．

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    阅读理解

    　　Why Is the Sun Important?

    　　The sun is a huge, hot, bright star．It is important because without it there would be no life on Earth．The sun gives us light and heat．

    　　All living things need light and heat from the sun to live．Plants need light and heat to grow．They use the light from the sun to make food．We cannot make our own food, but plants can．All the food we eat comes from plants in a food chain(链)which starts with the sun．For example．

    　　Animals need sunlight, too．Just like us, their food comes from a food chain which begins with the sun and the plants．

    　　sun→leaf→caterpillar(毛虫)→bird

    　　sun→seaweed(海藻)→small fish→whale(鲸)

    　　Sunlight means we can see during the day．If there was no sun, it would be dark all the time．Even when the sky is cloudy, the sunlight is very strong and it shines through the clouds．

    (1)

    Which words tell us what the sun is like?

    [　　]

    A．

    Huge．

    B．

    Hot．

    C．

    Bright．

    D．

    All above．

    (2)

    What are the two main things the sun gives us?

    [　　]

    A．

    Light and heat．

    B．

    Heat and eggs．

    C．

    Corn and light．

    D．

    Wheat and bread．

    (3)

    Why can we still see during the day when the sky is cloudy?

    [　　]

    A．

    Because we can see all day and all night．

    B．

    Because the sun can't give us light all day long．

    C．

    Because the sunlight can shine through the clouds．

    D．

    Because we can't see at night．

    (4)

    All the food we eat comes from．And it starts with the ________．

    [　　]

    A．

    plants; earth

    B．

    a food chain; sun

    C．

    food; sun

    D．

    plants; star

    (5)

    In what way do you think the sun cannot be harmful?

    [　　]

    A．

    The sun can do harm to your eyes and skin．

    B．

    It can make rivers too dry．

    C．

    Without it there would be no life on Earth．

    D．

    Hot sun on dry land can cause fires．

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    For many years, scientists couldn't figure out how atoms and molecules on the Earth combined to make living things. Plants, fish, dinosaurs, and people are made of atoms and molecules, but they are put together in a more complicated way than the molecules in the primitive ocean. What's more, living things have energy and can reproduce, while the chemicals on the Earth 4 billion years ago were lifeless.
    　　After years of study, scientists figured out that living things, including human bodies, are basically made of amino acids and nucleotide bases. These are molecules with millions of hydrogen, carbon, nitrogen, and oxygen atoms. How could such complicated molecules have been formed in the primitive soup? Scientists were stumped.
    　　Then, in 1953, two scientists named Harold Urey and Stanley L. Miller did a very simple experiment to find out what had happened on the Primitive Earth. They set up some tubes and bottles in a closed loop, and put in some of the same gases that were present in the atmosphere 4 billion years ago: water vapor, ammonia, carbon dioxide, methane, and hydrogen.
    　　Then they shot an electric spark through the gases to simulate bolts of lightning on the ancient Earth, circulated the gases through some water, sent them back for more sparks, and so on. After seven days, the water that the gases had been bubbling through had turned brown. Some new chemicals were dissolved in it. When Miller and Urey analyzed the liquid, they found that it contained amino acids-the very kind of molecules found in all living things.
    61. When did scientists come to realize how the atoms and molecules on the Earth combined to make living thing?
    　　A. 4 billion years ago. B.1953.　C. After seven days.D. Many years later.
    62. Scientists figured out that human bodies are basically made of .
    A.amino acids
    B.molecules
    C. hydrogen, carbon, nitrogen and oxygen atoms
    D. water vapor, ammonia, carbon dioxide, methane and hydrogen
    63. Harold Urey and Stanley L.Miller did their experiment in order to .　
    A. find out what had happened on the Earth 4 billion years ago
    　　 B.simulate bolts of lightning on the ancient Earth
    　　 C. dissolve some new chemicals
    　　D.analyze a liquid
    64. At the end of the last paragraph, the underlined word "it" refers to .
    A. a closed loop   B. an electric spark   C.water   D. the liquid
    65. According to the writer, living things on the Earth include .
    　A. atoms and molecules                     B.chemicals　
    C. plants, fish, dinosaurs and human beings     D.the primitive soup

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    Once upon a time, in the garden of the Chinese Emperor(皇帝) there lived a nightingale(夜莺).She sang　1　.And one day the Emperor was so moved when he　2　the bird sing that tears came into his eyes. He then had the 　3　 kept in a beautiful cage in his palace and listened to her every day. Before long the Emperor received a gift of a　4　　　　 　nightingale from Japan. It could　5　some of the songs the real bird sang. Now the toy bird gave the Emperor much 6　.And it was able to sing three-and-?thirty times without being tired.　7　?being killed, the living nightingale had flown out of the ?　8　?,back to her green woods. But one evening, when the toy bird was singing its best, something　9　 the bird went out of order. No one could repair it. No　10　of any nightingale was heard. Many years passed, and the Emperor felt so　11　that he lay ill and, it was said, was going to　12　.He wanted very much to hear the　13　song again. All at once there came the beautiful　14　of a nightingale through the window. The living nightingale came to sing for the　15　again. And life began to return to the Emperor.“16　,little bird,” said the Emperor. “I didn't treat you well before,　17　you have given me life again. How can I reward you?”

    “You have done that already,” said the nightingale. “I brought　18　to your eyes the first time I sang; I shall never forget that.” The Emperor felt 　19 and got well again. The nightingale often came to sit in a tree of the palace garden and sing something to　20　 the Emperor happy.

    1. A. beautifully　　　　　 B. badly　　　　C. terribly　　　　 D. carelessly

    2. A. saw　　　　　　 B. heard　　　　 C. watched　　　　 D. looked at

    3. A. machine　　　　　 B. pianist　　　　 C. bird　　　　　　　D. girl

    4. A. true　　　　　　 B. real　　　　　 C. living　　　　　　D. toy

    5. A. read　　　　　　　　B. write　　　　　C. dance　　　　　 D. sing

    6. A. praise　　　　　　 B. luck　　　　　 C. pleasure　　　　 D. sadness

    7. A. Without　　　　　　 B. With　　　　　 C. For　　　　　　　D. At

    8. A. cage　　　　　　　　B. box　　　　　 C. forest 　　　　　 D. square

    9. A. inside　　　　　　 B. outside　　　　 C. next to　　　　 D. far away from

    10. A. singing　　　　　　B. crying　　　　　 C. chime　　　　　 D. carol

    11. A. happy　　　　　　 B. pleased　　　　 C. sorry　　　　　 D. glad

    12. A. marry　　　　　　 B. fade　　　　　 C. leave　　　　　 D. die

    13. A. chemist's　　　　　B. musician's　　　　 C. toy's　　　　　 D. nightingale's

    14. A. song　　　　　　 B. throat　　　　　 C. talk　　　　　 D. noise

    15. A. woman　　　　　　B. prisoner　　　　 C. tourist　　　　 D. Emperor

    16. A. Thank you　　　　　B. Sorry　　　　　 C. Pardon　　　　 D. Goodbye

    17. A. and so　　　　　　 B. and yet　　　　 C. for　　　　　 D. because

    18. A. glasses　　　　　　 B. favours　　　　 C. tears　　　　　 D. waters

    19. A. strong　　　　　　 B. weak　　　　　 C. foolish　　　　　D. ill

    20. A. let　　　　　　　 B. make　　　　　 C. have　　　　　 D. ask

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