Over the past l00 years,sea level      steadily as a result of global warming.
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A
had increased
B
has been increasing
C
increased
D
is increasing
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The vegetables didn’t taste very good.They____too long. 
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A
had been cooked
B
were cooked
C
had cooked
D
cooked
Professor James will give up a lecture on the Western culture,but when and where _______ yet.
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A
hasn’t been decided
B
haven’t decided
C
isn’t being decided
D
aren’t decided