单项选择题

If the technical problems can be worked out, which method is the most promising

A．Voiceprints.
B．Fingerprints.
C．Photographs.
D．Signatures.
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单项选择题
According to the passage, cirrhosis (Para. l) is ______.
A．a bad habit resulting from drinking too much
B．a severe brain disease
C．the inevitable result of heavy drink
D．a fatal liver disease
单项选择题
Judging from what he has written, we can know that the writer is ______.
A．an experienced reporter
B．a medical researcher
C．an alcohol producer
D．a social worker
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