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5、     Deserts are found where there is little rainfall or where rain for a whole year falls in only a few weeks' time. Ten inches of rain may be enough for many plants to survive (存活)if the rain is

spread throughout the year, If it falls, within one or two months and the rest of the year is dry, those plants may die and a desert may form.   

     Sand begins as tiny pieces of rock that get smaller and smaller as wind and weather wear them down. Sand dunes (沙丘) are formed as winds move the sand across the desert. Bit by bit, the

dunes grow over the years, always moving with the winds and changing the shape. Most of them are only a few feet tall, but they can grow to be several hundred feet high.

There is, however, much more to a desert than sand. In the deserts of the southwestern United States, cliffs (懸崖) and deep valleys were formed from thick mud that once lay beneath a sea more than millions of years ago. Over the centuries, the water dried up. Wind, sand , rain, heat and cold all wore away at the remaining rocks. The faces of the desert mountains are always changing -very, very slowly ---as these forces of nature continue to work on the rock.

     Most deserts have a surprising variety of life. There are plants, animals and insects that :have adapted to life in the desert. During the heat of the day, a visitor may see very few signs of living things, but as the air begins to cool in the evening, the desert comes to life. As the sun begins to rise again in the sky, the desert once again becomes quiet and lonely.

60. Many plants may survive in deserts when__________________.

      A. the rain is spread out in a year            B. the rain falls only in a few weeks

      C. there is little rain in a year                D. it is dry all the year round

61. Sand dunes are formed when___________________.

      A. sand piles up gradually                 B. there is plenty of rain in a year

      C. the sea has dried up over the years       D. pieces of rock get smaller

62. The underlined sentence in the third paragraph probably means that in a desert there is____________.

     A. too much sand                           B. more sand than before

     C. nothing except sand                       D. something else besides sand

63 It can be learned from the text that in a desert____________.

      A. there is no rainfall throughout the year  B. life exists in rough conditions

      C. all sand dunes are a few feet high       D. rocks are worn away only by wind and heat

5、60A

解析:細(xì)節(jié)理解題。文章第一自然段中的“Ten inches ofrain... if the rain is spread through out the year.”可知 A 為正確選項(xiàng)。

61A

解析:細(xì)節(jié)理解題。文章第二自然段中的“Bitby bit,...and changing the shape.”可得知 A 為正確答案。

62D

解析:聯(lián)系上下文,緊接劃線(xiàn)句子的后面一句就進(jìn)行了解釋說(shuō)明,故正確答案為 D。

63B

解析:細(xì)節(jié)理解題。在文章最后一段的“Most deserts have a surprising variety of life”中就可知道 B 為正確選項(xiàng)。

 

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There is, however, much more to a desert than sand. In the deserts of the southwestern United States, cliffs (懸崖) and deep valleys were formed from thick mud that once lay beneath a sea more than millions of years ago. Over the centuries, the water dried up. Wind, sand , rain, heat and cold all wore away at the remaining rocks. The faces of the desert mountains are always changing –-very, very slowly ---as these forces of nature continue to work on the rock.
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  1. 1.

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    1. A.
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    2. B.
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    3. C.
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    Sand dunes are formed when___________________

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    2. B.
      there is plenty of rain in a year
    3. C.
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    4. D.
      pieces of rock get smaller
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    The underlined sentence in the third paragraph probably means that in a desert there is____________

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      too much sand
    2. B.
      more sand than before
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    4. D.
      something else besides sand
  4. 4.

    It can be learned from the text that in a desert____________

    1. A.
      there is no rainfall throughout the year
    2. B.
      life exists in rough conditions
    3. C.
      all sand dunes are a few feet high
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  1. 1.

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    1. A.
      the rain falls only in a few weeks
    2. B.
      the rain is spread out in a year
    3. C.
      there is little rain in a year
    4. D.
      it is dry all the year round
  2. 2.

    Sand dunes are formed when______.

    1. A.
      there is plenty of rain in a year
    2. B.
      sand piles up gradually
    3. C.
      the sea has dried up over the years
    4. D.
      pieces of rock get smaller
  3. 3.

    The underlined sentence in the third paragraph probably  means that in a desert there is______.

    1. A.
      too much sand
    2. B.
      more sand than before
    3. C.
      nothing except sand
    4. D.
      something else besides sand
  4. 4.

    It can be learned from the text that in a desert______.

    1. A.
      there is no rainfall throughout the year
    2. B.
      life exists in rough conditions
    3. C.
      all sand dunes are a few feet high
    4. D.
      rocks are worn away only by wind and heat
  5. 5.

    What’ the best title of this passage?

    1. A.
      Deserts
    2. B.
      The plants in the deserts
    3. C.
      The rainfall in the deserts
    4. D.
      Sand dunes

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