【单选题】
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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根据网考网移动考试中心的统计,该试题:
8%的考友选择了A选项
0%的考友选择了B选项
10%的考友选择了C选项
82%的考友选择了D选项