单项选择题

The supply of ground water is getting low because of ______.

A．conservation
B．poisonous water
C．pollution
D．population increase
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单项选择题
I wish we had a color television. I'm ______ pictures in black and white.
A．tired of
B．interested in
C．fond of
D．fed up
单项选择题
Don't ______. I can help you with the typing.
A．matter
B．care
C．worry
D．concern
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