I know the whole truth

      At school Little Johnny was told by a classmate that most adults are hiding at least one dark secret,and that this makes it very easy to blackmail them by saying,"I know the whole truth."

      Little Johnny decides to go home and tries it out.He goes home,and as he is greeted by his mother he says,"I know the whole truth."His mother quickly hands him$20 and says,"Just don't tell your father."

     Quite pleased,the boy waits for his father to get home from work,and greets him with,"I know the whole truth."The father promptly hands him$40 and says,"Please don't a word to your mother."

     Very pleased,the boy is on his way to school the next day when he sees the mailman at his front door.The boy greets him by saying,"I know the whole truth."The mailman immediately drops the mail,opens his arms,and says,"The come and give your real father a big hug."

      在学校里，一个同学告诉小强尼说，几乎所所有的大人都至少有一个见不得人的秘密。因此，只要说一句：“我全都知道了！”就可以轻松地讹诈他们。

     小强尼决定回家试一下，他回到家里，当他妈妈和他打扫呼的时候，他说：“我全都知道了！”他母亲马上给他20块钱，说：“别告诉你爸爸。”

      小强尼相当高兴，于是等着他父亲下班回家，他用“我全都知道了！”来迎接他爸爸。他父亲立刻给他40块钱，并说：“别向你妈妈透露一个字。”

      第二天，非常高兴的小强尼去上学，在他家大门口看见了邮差，这孩子用“我全都知道了！”和他打招呼。邮差一下子扔掉了邮件，张开了他的双臂，对着小强尼说：“那快过来，拥抱一下你真正的父亲吧！”

blackmail  v.勒索；敲诈（记忆方法：black黑色的+mail信件=黑函，转义为“敲诈”）

try sth. out 试验（类似词组：try on 试穿；试戴； try for 立志要；企图达到）

give sb. a big hug 紧紧抱住某人