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。

单项选择题 A1/A2型题
问答题 论述题