题目内容
【题目】Over the past decades, the sea ice ______ in the Arctic as a result of global warming.
A. had decreased
B. decreased
C. has been decreasing
D. is decreasing
【答案】C
【解析】从语意和前面的over the past decades可知,此处应用现在完成进行时,表示动作从过去一直持续到现在并将继续下去。
练习册系列答案
相关题目