I'm sure you（）an original signature, not a faxed copy.

单项选择题汉译英：“商业发票；订货单”，正确的翻译为（）。

A．purchase order；commercial invoice
B．commercial invoice；purchase order
C．commercial invoice；proforma invoice
D．proforma invoice；purchase order

单项选择题I would like （） ask you a favor.

A．to
B．in
C．with
D．on