题目内容

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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