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单选题
The population of the earth（）increasing fast. One third of the population here（）workers.
A
is;are
B
is;hasbeen
C
are;is
D
is;was
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Passage 2
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The population of the earth（）increasing fast. One third of the population here（）workers.A、is;areB、is;hasbeenC、are;isD、is;was
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is;areB
is;hasbeenC
are;isD
is;was
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