单项选择题

The ________ problem of bring a space-ship back from the moon has been solved.

A．technical
B．technological
C．technique
D．technology
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单项选择题
Urban congestion would greatly be relieved if the ________ charged on public transport Were more reasonable.
A．prices
B．tickets
C．fees
D．fares
单项选择题
To meet the ever increasing demand ________ oil - refining equipment, the company will produce more of such equipment.
A．of
B．on
C．with
D．for
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