_____ you have a complaint to make,do something about it right away.The longer you wait,the harder it will be to get you

问题描述:

_____ you have a complaint to make,do something about it right away.The longer you wait,the harder it will be to get your complaint resolved.
A.If B.Unless C.Though D.Since

A能解释一下吗,C项为什么不对呢C翻译成尽管,那就是:尽管你要抱怨,那就尽快。等得越久越难解决。这样解释不通。A的话翻译成:如果你要抱怨就尽快,等得越久越难解决