In the past decades, sea ice ____ in the
题型:选择题
问题:
In the past decades, sea ice ____ in the Arctic as a result of global warming.[ ]
A. had melted
B. has been melting
C. melted
D. is melting
In the past decades, sea ice ____ in the Arctic as a result of global warming.[ ]
A. had melted
B. has been melting
C. melted
D. is melting