练习册

  • 练习册
  • 试题
    People and a lot of animals live on . 【查看更多】

     

    题目列表(包括答案和解析)

    Reading comprehension. 阅读理解.

    　　Scientists are trying to make the deserts (沙漠) into good land again. They are learning a lot about them, but more and more land is becoming deserts all the time. Scientists may not be able to change the deserts in time.

    　　Why is more and more land becoming deserts? People make deserts. They are doing bad things to the earth.

    　　There isn't much rain in some places on the earth, but still they don't become deserts. Why? Because some green plants and grass are growing there and they are very important to dry places. Plants can let the hot sun not make the land even drier and let the wind not blow the land away. When a little rain falls, the plants hold the water. Without plants, the land can become a desert more easily.

    Choose the best answer. 选择最恰当的答案, 用A, B, C或D表示, 填入括号内.

    (1) Deserts ________.

    [　　]

    A．can get very little rain

    B．never have any plants or animals in them

    C．can all be turned into good land soon

    D．are good places for people to live in

    (2) Green plants are very important to dry places because ________.

    [　　]

    A．they don't let the sun make the land even drier

    B．they make the deserts beautiful

    C．they let the wind blow the land away

    D．they can keep the water

    (3) Land is becoming desert all the time because ________.

    [　　]

    A．plants can't grow there

    B．there is not enough rain

    C．people are doing something wrong to it

    D．both B and C

    (4) Which is the main idea of the first paragraph?

    [　　]

    A．Scientists know nothing about the deserts.

    B．Land is becoming desert faster than people can stop it.

    C．Scientists have changed all the deserts into good land.

    D．It's easy to change desert into land.

    (5) After reading the passage we will know that ________.

    [　　]

    A．plants can stop dry land from becoming desert

    B．it is good to cut down all the plants in the desert

    C．all places without much rain will become desert

    D．it is better to grow crops on dry land than to grow grass

    查看答案和解析>>

    阅读理解

    Scientists are trying to make the desert into good land againThey want to bring water to the desert,so people can live and grow foodThey are learning a lot about the desertBut more and more places of the Earth is becoming desert all the timeScientists may not change the desert in time．

    Why is more and more land becoming desert?Scientists think that people make desertPeople are doing bad things to the earth

    Some places on the earth don't get much rainBut they still don't become desertThis is because some green plants are growing thereSmall green plants and grass are very important to dry placesPlants don't let hot sun make the earth even drierPlants don't let the wind blow the dirt awayWhen a little rain falls,the plants hold the water．Without plants,the land can become desert much more easily

    (1)

    Desert ________

    [　　]

    A．

    gets not much water

    B．

    never has any plants or animals in it

    C．

    both A and B

    D．

    can all be turned into good land before long

    (2)

    Small green plants and grass are very important to dry places because ________

    [　　]

    A．

    they don't let the sun make the earth much drier

    B．

    they don't let the wind blow the earth away

    C．

    they hold the water

    D．

    all the above

    (3)

    Land is becoming desert little by little because ________

    [　　]

    A．

    plants can't grow there

    B．

    there is not enough water

    C．

    people are doing bad things to the earth

    D．

    scientists know little about desert

    (4)

    After reading this passage,we learn that ________

    [　　]

    A．

    plants can keep dry land from becoming desert

    B．

    it is good to get red of the grass in desert

    C．

    all places without much rain will become desert

    D．

    it is better to grow crops on dry land than to grow grass

    (5)

    Without plants,________

    [　　]

    A．

    the land can become desert much more easily

    B．

    we don't have water

    C．

    the sun will be hot

    D．

    we get little rain

    查看答案和解析>>

    Scientists are trying to make the deserts（沙漠）into good land again. They want to bring water to the deserts, so people can live and grow food. They are learning a lot about the deserts. But more and more of the earth is becoming desert all the time. Scientists may not be able to change the deserts. People are bad things to the earth.

    Some places on the earth don’t get much rain. But they still become deserts. This is because some green plants are growing there. Small green plants and grass are very important to dry places. Plants don’t let the wind blow the soil（土壤）away. When a bit of rain falls, the plants hold the water. Without plants, the land can become a desert much more easily.

    (     ) 1. Deserts________

    A.      get very little rain

    B.      never have any plants or animals in them

    C.      can all be turned into good land before long

    D.     both A and C

    (    ) 2. Small green plants are very important to dry places because______

    A.      they don’t let the sun make the earth even drier

    B.      they don’t let the wind blow the earth away

    C.      they hold water

    D.     all of the above

    (    ) 3. Land is becoming desert little by little because________

    A.      plants can’t grow there

    B.      there is not enough rain

    C.      people haven’t done what scientists wish them to do

    D.     scientists know little about the deserts

    (    ) 4. Which is the main（主要的）idea of the first paragraph?

    A.      Scientists know how to change desert into good land

    B.      Land is becoming desert faster than scientists can change it back into good land

    C.      If scientists can bring water to desert, people can live and grow food there

    D.     More and more places are becoming deserts all the time

    (    ) 5. After reading this, we can learn that _______

    A.      plants can keep dry land from becoming desert

    B.      it is good to get rid of the grass in the deserts

    C.      all places without much rain will become deserts

    D.     it is better to grow crops（谷物）dry land than to grow grass

    查看答案和解析>>

    阅读理解。
          Scientists are trying to make the deserts into good land again. They want to bring water to the deserts, so
    people can live and grow food. They are learning a lot about the deserts. But more and more of the earth is
    becoming desert all the time. Scientists may not be able to change the desert in time.
          Why is more and more land becoming desert? Scientists think that people make deserts. People are doing
    bad things to the earth.
          Some places on the earth don't get much rain. But they still don't become deserts. This is because some
    green plants are growing there. Small green plants and grass are very important to dry places. Plants don't let the
    hot sun make the earth even drier. Plants don't let the wind blow the dirt away. When a little bit of rain falls, the
    plants hold the water. Without plants, the land can become a desert much more easily.
    1. Deserts _________.
    [     ]
    A. get very little rain
    B. never have any plants or animals in them
    C. can all be turned into good land in the future
    D. both A and C
    2. Small green plants are very important to day places because ________.
    [     ]
    A. they don't let the sun make the earth even drier
    B. they don't let the wind blow the earth away
    C. they hold the water
    D. A, B and C
    3. Land is becoming desert little by little because ________.
    [     ]
    A. plants can't grow there
    B. there's not enough rain
    C. people are doing bad things to the earth.
    D. scientists know little about desert
    4. Which is the main idea of the first paragraph?
    [     ]
    A. Scientists know how to change land into good land.
    B. Land is becoming desert faster than scientists can change it back into good land.
    C. If scientists can bring water to the desert, people can live there.
    D. More and more places are becoming deserts all the time.
    5. After reading this, we learn that ________.
    [     ]
    A. plant can keep dry land from becoming desert.
    B. it is good to get rid of (清除) the grass in the desert
    C. all places without much rain will become deserts
    D. it is better to grow crops on dry land than to grow grass

    查看答案和解析>>

    阅读理解。
        Scientists are trying to make the deserts into good land again. They want to bring water to the deserts, so
    people can live and grow food. They are learning a lot about the deserts. But more and more of the earth is
    becoming desert all the time. Scientists may not be able to change the desert in time. 
        Why is more and more land becoming desert? Scientists think that people make deserts. People are doing
    bad things to the earth.
        Some places on the earth don't get very much rain. But they still don't become deserts. This is because
    some green plants are growing there. Small green plants and grass are very important to dry places. Plants
    don't let the hot sun make the earth even drier. Plants don't let the wind blow the dirt away. When a little bit
    of rain falls. The plants told the water. Without plants, the land can become a desert much more easily.
    1. Deserts ______.
    [     ]
    A. get very little rain
    B. never have any plants or animals in them
    C. can all be turned into good land before long
    D. both A and B
    2. Small green plants are very important to dry places because           .
    [     ]
    A. they don't let the sun make the earth even drier
    B. they don't let the wind blow the earth away
    C. they hold water
    D. all of the above
    3. Land is becoming desert little by little because           .
    [     ]
    A. plants can't grow there
    B. there is not enough rain
    C. people haven't done what scientists wish them to do
    D. scientists know little about the deserts
    4. Which is the main idea of the first paragraph?
    [     ]
    A. Scientists know how to change desert into good land.
    B. Land is becoming desert faster than scientists can change it back into good land.
    C. If scientists can bring water to desert, people can live and grow food there.
    D. More and more places are becoming deserts all the time.
    5. After reading this, we learn that           .
    [     ]
    A. plants can keep dry land from becoming desert
    B. it is good to get rid of the grass in the deserts
    C. all places without much rain will become deserts
    D. it is better to grow crops on dry land than to grow grass

    查看答案和解析>>


    同步练习册答案