题目内容
14.Over the past ten years,sea ice _________ in the Arctic because of global warming.( )A. | had decreased | B. | decreased | ||
C. | is decreasing | D. | has been decreasing |
分析 在过去的十年里,由于地球变暖,北极的冰川在一直减少.
解答 答案为D.根据"Over the past ten years"可知减少这个动作从过去就开始了并且直到现在仍在进行,所以用现在完成进行时,因此答案为D
点评 考查现在完成进行时.
现在完成进行时其表达的意思有两种:
1.表示从过去某时开始一直持续到现在的动作,并且还将持续下去.
2.表示在说话时刻之前到现在正在进行的动作.

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