单项选择题

The distance a manager should maintain at large briefings is______.
A．less than 3 feet
B．exact 3 feet
C．more than 3 feet
D．about 3 inches

A.
A．less
B.exact
C.more
D.about
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单项选择题
【C5】
A.mostly
B．partially
C．sometimes
D．rarely
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