单项选择题

In ______ times human beings did not travel for pleasure but to find a more favourable climate.

A．prime
B．primitive
C．primary
D．preliminary
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单项选择题
Some people criticize family doctors for ______ too many medicines for minor illnesses.
A．prescribing
B．ordering
C．advising
D．delivering
单项选择题
The most ______ technological success in the twentieth century is probably the computer revolution.
A．prominent
B．prosperous
C．solemn
D．prevalent
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