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    9．Over the past decades, sea ice in the Arctic as a result of global warming. A．had decreased B．decreased C．has been decreasing D．is decreasing 【查看更多】

     

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    Over the past decades, sea ice _______ in the Arctic as a result of global warming.


    1. A.
      had decreased
    2. B.
      decreased
    3. C.
      has been decreasing
    4. D.
      is decreasing

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    Over the past decades, sea ice _______ in the Arctic as a result of global warming.

    A. had decreased     B. decreased    C. has been decreasing     D. is decreasing

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    Over the past decades, sea ice _____ in the Arctic as a result of global warming.

    A. had decreased    B. more than            C. attach               D. apply

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    Over the past decades , sea ice          in the Arctic as a result of global warming .

    A. had decreased    B. decreased    C. has been decreasing    D. is decreasing  .

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    Over the past decades, sea ice     in the Arctic as a result of global warming.

    A. had decreased  B. decreased   C. has been decreasing D. is decreasing

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