What's too much for me,just right for two,but nothing at all for three?
翻译：什么东西对一个人来说太多,对两个人来说正好,对三个人来说就什么也不是了?
答案：A secret (秘密）
美国人常说“Just between you and me”意即“keep it a secret”（仅
限于你我之间,请保守秘密）.