(2013·济南一模) you are unable to deal with it, perhaps we should ask someone else for help.
A. Although
B. While
C. Since
D. Unless
网友回答
A. Although
B. While
(答案→)C. Since
D. Unless
解析：选C 考查状语从句。句意：既然你不能处理此事，我们也许应该请别人来帮忙。since“既然，由于”，符合句意。although“尽管”；while“当……时”；unless“除非”。