问题
选择题
In the past few years, sea ice ____ in the Arctic as a result of global warming.
A.had melted
B.has been melting
C.melted
D.is melting
答案
答案:B
考查时态。根据in the past few years可知是与完成时连用的,在根据句意是指海冰一直都在融化。所以使用现在完成进行时。句意:在过去几年里,因为全球变暖,海冰一直在融化。