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
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单项选择题
The soldier was ______ with neglecting his duty.
A．charged
B．conducted
C．changed
D．committed
单项选择题
The reason why the car stopped was ______.
A．because the road was not good
B．that the road was not good
C．due to the bad road
D．because of the bad road
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