单项选择题

Over the past decades, ice（）in the Arctic as a result of global warming.

A. had decreased
B. decreased
C. has been decreasing
D. is decreasing

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单项选择题
—Hi, Torry, can I use your computer for a while this afternoon —Sorry.（）.

A. It's repaired
B. It has been repaired
C. It' s being repaired
D. It had been repaired
单项选择题
—I wonder why Mary is so unfriendly to us. —She is（）than unfriendly, I' m afraid.

A. shyer
B. much shyer
C. shy more
D. more shy
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