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Many scientists have been probing psychological problems.
A．solving
B．exploring
C．settling
D．handling
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Some scientists think that the larger number of whales makes it hard to find enough food．More whales create more pressure on the food supply,a supply that some scientists say may have dwindled as a result of the warm waters of El Nino.
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B.There may not be enough food for them in Alask
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met withC
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provided with
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people in the 19th century were eager to eat sugarB
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scientists can do nothing without the money subsidized secretly
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