your brain teasers are always hard. In order to prevent

来源: 2012-08-01 10:41:02 [博客] [旧帖] [给我悄悄话] 本文已被阅读:

my brain cells from getting damaged, to this one, here is the simple answer I just figured out:  4 dollars brought up the innuendo, I want to see who will make the 50 cents.