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
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单项选择题
The goods are now ready( )packing.
A. of
B. to

C. with
D. for
单项选择题
C. O. means （） of origin.

A．certificate
B．currency
C．container
D．catalogue
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