单项选择题

Long ______ to harmful pollutants is most likely to lead to a decline in health.

A．exposure
B．contact
C．use
D．touch
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单项选择题
To my mind, his integrity is ______.
A．below a suspicion
B．above a suspicion
C．below suspicion
D．above suspicion
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Ask for a doctor as quickly as possible and tell him it's a ______ of life and death.
A．thing
B．matter
C．question
D．problem
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