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Over the past decades, forest area in China as a result of massive deforestation

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Over the past decades, forest area in China as a result of massive deforestation

Over the past decades, forestarea ______ in China as a result of massive deforestation.

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

 

试题答案

【答案】

D

【解析】 略