单项选择题

The matter is not to be ________.

A．watched for
B．waited on
C．taken over
D．trifled with
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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
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
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