单项选择题

Ice on the road is a major ______ at this time of the year.

A．terror
B．nuisance
C．hardship
D．hazard
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单项选择题
To carry out a company's rules and regulations, administrative personnel must know ______.
A．to be firm
B．being firm
C．what to be firm
D．how to be firm
单项选择题
The soldier was ______ with neglecting his duty.
A．charged
B．conducted
C．changed
D．committed
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