This rock has to be _______ in order to build a road.


  1. A.
    blasted
  2. B.
    explored
  3. C.
    hired
  4. D.
    maintained
A
句意為:“為了修一條路,這個石頭只有……!憋@然石頭只能被以某種方式清除掉。blast“爆破”。
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  The top layer of this soil is not very deep, but it is one of the most important things in the world. To grow well, plants need good topsoil. First, topsoil is made of little pieces of rock. Wind and sun, ice and water and plants have slowly broken big rocks up into little pieces. Then, these little pieces of rock have become mixed with many other bits of things:crumbled(粉碎的)pieces of dead plants and dried leaves, even dead insects and other dead animals. So the topsoil is bits of rock mixed with humus that used to be living things.

  In some places earthworms are helpful in making good soil. As they crawl through the earth getting their food, they. make little tunnels that air and water come through. And they turn the soil over in such a way that rock pieces are slowly pushed to the top. Besides, earthworms grind up the soil as they eat.

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1.The layer which spreads over most of the rock is called ________.

[  ]

A.topsoil
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[  ]

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[  ]

A.four
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[  ]

A.living
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5.What will happen if you put a handful of topsoil in a glass of water?

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科目:高中英語 來源:英語教研室 題型:050

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[  ]

A.

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[  ]

A.

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(3)

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[  ]

A.

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B.

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C.

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