Over the past decades,sea ice___________in the Arctic as a r

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
汪园园 1年前 已收到1个回答 举报

landaoai 花朵

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C

1年前

2
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