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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
正确答案是:
同类题型

What does the sign over there read—No person smokeor carry a lighted cigarette, cigar or pipe in this area.

People______drugs have much difficulty in getting rid of the________. [ ]

Did you enjoy the outdoor training yesterday—No, not at all! I was _______ dead after so much hard training.

Why, Jack, you look so tired! –Well, I ___the house and I must finish the work tomorrow

________Mary ________ Jack is listening to the report carefully,because they are both interested in it very much.

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