We don’t need to do __ extra work this evening. The day’s work was almost at __ end now.

A．/ ; an

B．an; an

C．the; the

D．the; /

预付货款一般用于（）。

A.买方资金很充裕，卖方又急于取得货款时

B.销售生产周期长，售价高的产品

C.买方和卖方有口头协议时

D.卖方已知买方信用欠佳时