____ you can make are duction of 5% no business is possible.

____ you can make are duction of 5% no business is possible.
A、In case
B、Provided
C、If
D、Unless
【正确答案】：D
【题目解析】：in case以防万一；provided假如，倘若；if如果；unless如果不，除非句意：除非你们能降价5%，否则这笔生意几乎没有可能做成。