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    Plastics and other similar garbage that does not ________should not be thrown into the sea, though it may less contaminate the environment．


    1. A.
      break into
    2. B.
      break out
    3. C.
      break off
    4. D.
      break down
    D
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    1.According to the passage，plastic________.

    A．plays a big role in the modern world

    B．helps to protect our environment in some way

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    C．the production cost of arboform

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    B．introduce liquid wood which will replace plastic

    C．advertise new products made of arboform

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