问题
选择题
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
答案
答案：D
搜题请搜索小程序“爱下问搜题”
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
答案：D