In the past few years, sea ice ____ in t...

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

B 【解析】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。

考点分析：

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