Guess what!  
你猜怎么着!

I know something you don't know!  
我知道一些你不知道的事情!

Ask me what just happened.  
你猜刚刚发生什么事.

Have I got news for you!  
我有事要告诉你呢!

You'll never guess...  
你绝对猜不到......

You won't believe...  
你不会相信......

The weirdest thing just happened...  
最怪异的事情发生了......

I don't know how to tell you this...  
我不知如何对你启齿......

There's something that's been eating at me for a long time...  
有件事情在我心里藏了很久......