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    精英家教网 > 高中英语 > 题目详情
    Over the past l00 years，sea level      steadily as a result of global warming．
    A．had increasedB．has been increasingC．increased D．is increasing
    B
    考查时态，句意：在过去的100年中，作为地球变暖的结果海平面一直在稳定的上升。可知本句描述的是现在已完成的一直在进行的动作，故用完成进行时态。选B。
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