早晨，小昆急匆匆上学，把数学作业本丢在家里，交作业时没找到，以为是同桌小刚藏了起来，于是向他索要并发生争吵。小刚为此非常伤心，后来知道小昆多次想找他道歉，因有顾虑，只好作罢。

（1）假如你是小刚，你的正确做法是：________________________________________________________ 

（2）你这样做的理由是：____________________________________________________________________

—Is Mr. Wang still teaching in this school?

—I’m afraid not. He is said _______ the school as he was diagnosed with liver cancer.

A．to have left

B．to have been left

C．to leave

D．to be left