Over the past decades, sea ice _______ i
题型:选择题
问题:
Over the past decades, sea ice _______ in the Arctic as a result of global warming.
A.had decreased
B.decreased
C.has been decreasing
D.is decreasing
Over the past decades, sea ice _______ in the Arctic as a result of global warming.
A.had decreased
B.decreased
C.has been decreasing
D.is decreasing