单项选择题

He has forgotten what ______ are involved and the time taken ______ delivery. ( )

A．formalities, in
B．procedures, for
C．formalities, for
D．procedures, in
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单项选择题
It's a pleasure ( )be of help.
A．to
B．for
C．form
D．on
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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