问题
单项选择题
While we appoint an agent, it is usual to make the appointment ( ).
A．in writing
B．on paper
C．with writing
D．write down
答案
参考答案：A
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While we appoint an agent, it is usual to make the appointment ( ).
A．in writing
B．on paper
C．with writing
D．write down
参考答案：A