问题
选择题
Over the past decades, sea ice _____ in the Arctic as a result of global warming.
A．had decreased
B．more than
C．attach
D．apply
答案
C
考查动词时态。从"over the past decades"可知, 在英语中"over /in the past /last + 时间段"要与"现在完成时"连用，选C。