单项选择题

The river was ______ with waste from that factory. Some measures must be taken to stop its production.

A. corrupted
B. consumed
C. contaminated
D. infected
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单项选择题
The young lovers were not allowed to get married because their two families were ______ enemies.
A. hereditary
B. congenital
C. innate
D. latent
单项选择题
Is there any possible ______ explanation for his bad health since he seems to have no obvious disease
A. psychiatric
B. psychological
C. surgical
D. physical
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