单项选择题

While modulation/demodulation technology was being standardized for the most recent modems, several other peripheral standards were also being developed.

A．auxiliary
B．notable
C．relevant
D．elemental
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Composed of song, dance, and personal invective, the old comedy plays also include outspoken political criticism and comment on literary and philosophical topics.
A．comical
B．witty
C．satirical
D．frank
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Since most doctors are ______ about effectiveness of the new medicine, they seldom recommend it to their patients.
A．anxious
B．dubious
C．cynical
D．innocent
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